1. Consider a titration of potassium dichromate solution with acidified Mohr's salt solution using diphenylamine as indicator. The number of moles of Mohr's salt required per mole of dichromate is
(A) 3
(B) 4
(C) 5
(D) 6
2.The correct statement(s) regarding defects in solids is(are)
(A) Frenkel defect is usually favoured by a very small difference in the sizes of cation and anion
(B) Frenkel defect is a dislocation defect
(C) Trapping of an electron in the lattice leads to the formation of F-center
(D) Schottky defects have no effect on the physical properties of solids
Paragraph
p-Amino-N, N-dimethylaniline is added to a strongly acidic solution of X. The resulting solution is treated with a few drops of aqueous solution of Y to yield blue colouration due to the formation of methylene blue. Treatment of the aqueous solution of Y with the reagent potassium hexcyanoferrate (II) leads to the formation of an intense blue precipitate. The precipitate dissolves on excess addition of the reagent. Similarly, treatment of the solution of Y with the solution of potassium hexacyanoferrate (III) leads to a brown colouration due to the formation of Z.
3. The compound X is
(A) NaNO3
(B) NaCl
(C) Na2SO4
(D) Na2S
4. The compound Y is
(A) MgCI2
(B) FeCI2
(C) FeCI3
(D) ZnCI2
5. The compound Z is
(A) Mg2[Fe(CN)6]
(B) Fe[Fe(CN)6]
(C) Fe4[Fe(CN)6]3
(D) K2Zn3[Fe(CN)6]2
Source JEE 2009 Paper 1
Saturday, October 10, 2009
IIT-JEE-Chemistry-Final Revision Set No.89
1. STATEMENT-1 : There is a natural asymmetry between converting work to heat and converting heat to work.
and
STATEMENT-2 : No process is possible in which the sole result is the absorption of heat from a reservoir and its complete conversion into work.
(A) Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
Paragraph BASED QUESTIONS
In hexagonal systems of crystals, a frequently encountered arrangement of atoms is described as a hexagonal prism. Here, the top and bottom of the cell are regular hexagons and three atoms are sandwiched in between them. A space-filling model of this structure, called hexagonal close-packed (HCP), is constituted of a sphere on a flat surface surrounded in the same plane by six identical spheres as closely as possible. Three spheres are then placed over the first layer so that they touch each other and represent the second layer. Each one of these three spheres touches three spheres of the bottom layer. Finally, the second layer is covered with a third layer that is identical to the bottom layer in relative position. Assume radius of every sphere to be 'r'.
2. The number of atoms in this HCP unit cell is
(A) 4
(B) 6
(C) 12
(D) 17
3. The volume of this HCP unit cell is
(A) 24 √2 r³
(B) 16 √2 r³
(C) 12 √2 r³
(D) 64/3√3 r³
4. The empty space in this HCP unit cell is
(A) 74%
(B) 47.6%
(C) 32%
(D) 26%
5. Identify the process used to extract the metal/compound from the given ore
Roasting, Calcinations, Carbon reduction, Self reduction
PbS --> PbO
CaCO3 --> CaO
ZnS --> Zn
Cu2S --> Cu
Source: IIT JEE 2008 paper 2
and
STATEMENT-2 : No process is possible in which the sole result is the absorption of heat from a reservoir and its complete conversion into work.
(A) Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
Paragraph BASED QUESTIONS
In hexagonal systems of crystals, a frequently encountered arrangement of atoms is described as a hexagonal prism. Here, the top and bottom of the cell are regular hexagons and three atoms are sandwiched in between them. A space-filling model of this structure, called hexagonal close-packed (HCP), is constituted of a sphere on a flat surface surrounded in the same plane by six identical spheres as closely as possible. Three spheres are then placed over the first layer so that they touch each other and represent the second layer. Each one of these three spheres touches three spheres of the bottom layer. Finally, the second layer is covered with a third layer that is identical to the bottom layer in relative position. Assume radius of every sphere to be 'r'.
2. The number of atoms in this HCP unit cell is
(A) 4
(B) 6
(C) 12
(D) 17
3. The volume of this HCP unit cell is
(A) 24 √2 r³
(B) 16 √2 r³
(C) 12 √2 r³
(D) 64/3√3 r³
4. The empty space in this HCP unit cell is
(A) 74%
(B) 47.6%
(C) 32%
(D) 26%
5. Identify the process used to extract the metal/compound from the given ore
Roasting, Calcinations, Carbon reduction, Self reduction
PbS --> PbO
CaCO3 --> CaO
ZnS --> Zn
Cu2S --> Cu
Source: IIT JEE 2008 paper 2
IIT-JEE-Chemistry-Final Revision Set No.88
1. The IUPAC name of [Ni(NH3)4] [NiCI4] is
(A) Tetrachloronickel (II) - tetraamminenickel (II)
(B) Tetraamminenickel (II) - tetrachloronickel (II)
(C) Tetraamminenickel (II) - tetrachloronickelate (II)
(D) Tetrachloronickel (II) - tetraaminenickelate (0)
2. STATEMENT-1 : Aniline on reaction with NaNO2/HCI at 0°C followed by coupling with β-naphthol gives a dark blue coloured precipitate.
and
STATEMENT-2 : The colour of the compound formed in the reaction of aniline with NaNO2/HCI at 0°C followed by coupling with b-naphthol is due to the extended conjugation.
(A) Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
3. STATEMENT-1 : [Fe(H2O)5NO]SO4 is paramagnetic.
and
STATEMENT-2 : The Fe in [Fe(H2O)5NO]SO4 has three unpaired electrons.
(A) Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
4. STATEMENT-1 : The geometrical isomers of the complex [M(NH3)4CI2] are optically inactive.
and
STATEMENT-2 : both geometrical isomers of the complex [M(NH3)4CI2] possess axis of symmetry.
(A) Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
5. Electrolysis of dilute aqueous NaCI solution was carried out by passing 10 milli ampere current. The time required to liberate 0.01 mol of H2 gas at the cathode is (1 Faraday = 96500 C mol-1)
(A) 9.65 × 104 sec
(B) 19.3 × 104 sec
(C) 28.95 × 104 sec
(D) 38.6 × 104 sec
Soucre iit jee paper 2 2008
(A) Tetrachloronickel (II) - tetraamminenickel (II)
(B) Tetraamminenickel (II) - tetrachloronickel (II)
(C) Tetraamminenickel (II) - tetrachloronickelate (II)
(D) Tetrachloronickel (II) - tetraaminenickelate (0)
2. STATEMENT-1 : Aniline on reaction with NaNO2/HCI at 0°C followed by coupling with β-naphthol gives a dark blue coloured precipitate.
and
STATEMENT-2 : The colour of the compound formed in the reaction of aniline with NaNO2/HCI at 0°C followed by coupling with b-naphthol is due to the extended conjugation.
(A) Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
3. STATEMENT-1 : [Fe(H2O)5NO]SO4 is paramagnetic.
and
STATEMENT-2 : The Fe in [Fe(H2O)5NO]SO4 has three unpaired electrons.
(A) Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
4. STATEMENT-1 : The geometrical isomers of the complex [M(NH3)4CI2] are optically inactive.
and
STATEMENT-2 : both geometrical isomers of the complex [M(NH3)4CI2] possess axis of symmetry.
(A) Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
5. Electrolysis of dilute aqueous NaCI solution was carried out by passing 10 milli ampere current. The time required to liberate 0.01 mol of H2 gas at the cathode is (1 Faraday = 96500 C mol-1)
(A) 9.65 × 104 sec
(B) 19.3 × 104 sec
(C) 28.95 × 104 sec
(D) 38.6 × 104 sec
Soucre iit jee paper 2 2008
IIT-JEE-Chemistry-Final Revision Set No.87
1. STATEMENT-1 : Alkali metals dissolve in liquid ammonia to give blue solutions.
because
STATEMENT-2: Alkali metals in liquid ammonia give solvates species of the type [M(NH3)n]+ (M = alkali metals).
(A) Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
2. STATEMENT-1: Molecules that are not superimposable on their mirror images are chiral.
Because
STATEMENT-2: All chiral molecules have chiral centers.
(A) Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
3. STATEMENT-1: Band gap is germanium is small.
Because
STATEMENT-2: The energy spread of each germanium atomic energy level is infinitesimally small.
(A) Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
source: 2007 JEE paper 2
4. Among the following, the coloured compound is
(A) CuCI
(B) K3 [Cu(CN)4]
(C) CuF2
(D) [Cu(CH3CN)4]BF4
5. Both [Ni(CO)4] and [Ni(CN)4]2- are diamagnetic. The hybridization of nickel in these complexes, respectively, are
(A) sp3, sp3
(B) sp3, dsp2
(C) dsp2, sp3
(D) dsp2, dsp3
source: 2008 JEE, Paper 2
because
STATEMENT-2: Alkali metals in liquid ammonia give solvates species of the type [M(NH3)n]+ (M = alkali metals).
(A) Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
2. STATEMENT-1: Molecules that are not superimposable on their mirror images are chiral.
Because
STATEMENT-2: All chiral molecules have chiral centers.
(A) Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
3. STATEMENT-1: Band gap is germanium is small.
Because
STATEMENT-2: The energy spread of each germanium atomic energy level is infinitesimally small.
(A) Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
source: 2007 JEE paper 2
4. Among the following, the coloured compound is
(A) CuCI
(B) K3 [Cu(CN)4]
(C) CuF2
(D) [Cu(CH3CN)4]BF4
5. Both [Ni(CO)4] and [Ni(CN)4]2- are diamagnetic. The hybridization of nickel in these complexes, respectively, are
(A) sp3, sp3
(B) sp3, dsp2
(C) dsp2, sp3
(D) dsp2, dsp3
source: 2008 JEE, Paper 2
IIT-JEE-Chemistry-Final Revision Set No.86
1. The number of stereoisomers obtained by bromination of trans-2-butene is
(A) 1
(B) 2
(C) 3
(D) 4
2. A positron is emitted from 23Na11. The ratio of the atomic mass and atomic number of the resulting nuclide is
(A) 22/10
(B) 22/11
(C) 23/10
(D) 23/12
3. For the process H2O(l), (1 bar, 373 K) → H2O(g) (1 bar, 373 K), the correct set of thermodynamic parameters is
(A) DG = 0, DS = +ve
(B) DG = 0, DS = -ve
(C) DG = +ve, DS = 0
(D) DG = -ve, DS = +ve
4. Consider a reaction aG + bH → Products. When concentration of both of the reactants G and H is doubled, the rate increases by eight times. However, when concentration of G is doubled keeping the concentration of H fixed, the rate is doubled. The overall order of the reaction is
(A) 0
(B) 1
(C) 2
(D) 3
STATEMENT-1: Glucose gives a reddish-brown precipitate with Fehling's solution.
Because
STATEMENT-2: Reaction of glucose with Fehling's solution gives CuO and gluconic acid.
(A) Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
Source: 2007 JEE paper 2
(A) 1
(B) 2
(C) 3
(D) 4
2. A positron is emitted from 23Na11. The ratio of the atomic mass and atomic number of the resulting nuclide is
(A) 22/10
(B) 22/11
(C) 23/10
(D) 23/12
3. For the process H2O(l), (1 bar, 373 K) → H2O(g) (1 bar, 373 K), the correct set of thermodynamic parameters is
(A) DG = 0, DS = +ve
(B) DG = 0, DS = -ve
(C) DG = +ve, DS = 0
(D) DG = -ve, DS = +ve
4. Consider a reaction aG + bH → Products. When concentration of both of the reactants G and H is doubled, the rate increases by eight times. However, when concentration of G is doubled keeping the concentration of H fixed, the rate is doubled. The overall order of the reaction is
(A) 0
(B) 1
(C) 2
(D) 3
STATEMENT-1: Glucose gives a reddish-brown precipitate with Fehling's solution.
Because
STATEMENT-2: Reaction of glucose with Fehling's solution gives CuO and gluconic acid.
(A) Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
Source: 2007 JEE paper 2
IIT-JEE-Chemistry-Final Revision Set No.85
A 4.0 molar aqueous solution of NaCI is prepared and 500 mL of this solution is electrolysed. This leads to the evolution of chlorine gas at one of the electrodes (atomic mass: Na = 23, Hg = 200; 1 Faraday = 96500 coulombs).
1. The total number of moles of chlorine gas evolved is
(A) 0.5
(B) 1.0
(C) 2.0
(D) 3.0
2. If the cathode is a Hg electrode, the maximum weight (g) of amalgam formed from this solution is
(A) 200
(B) 225
(C) 400
(D) 446
3. The total charge (coulombs required for complete electrolysis is
(A) 24125
(B) 48250
(C) 96500
(D) 19300
--------------------
4. Consider a titration of potassium dichromate solution with acidified Mohr's salt solution using diphenylamine as indicator. The number of moles of Mohr's salt required per mole of dichromate is
(A) 3
(B) 4
(C) 5
(D) 6
5. Among the following metal carbonyls, the C-O bond order is lowest in
(A) [Mn(CO)6]+
(B) [Fe(CO)5]
(C) [Cr(CO)6]
(D) [V(CO)6]-
Source: 2007 JEE paper 2
1. The total number of moles of chlorine gas evolved is
(A) 0.5
(B) 1.0
(C) 2.0
(D) 3.0
2. If the cathode is a Hg electrode, the maximum weight (g) of amalgam formed from this solution is
(A) 200
(B) 225
(C) 400
(D) 446
3. The total charge (coulombs required for complete electrolysis is
(A) 24125
(B) 48250
(C) 96500
(D) 19300
--------------------
4. Consider a titration of potassium dichromate solution with acidified Mohr's salt solution using diphenylamine as indicator. The number of moles of Mohr's salt required per mole of dichromate is
(A) 3
(B) 4
(C) 5
(D) 6
5. Among the following metal carbonyls, the C-O bond order is lowest in
(A) [Mn(CO)6]+
(B) [Fe(CO)5]
(C) [Cr(CO)6]
(D) [V(CO)6]-
Source: 2007 JEE paper 2
IIT-JEE-Chemistry-Final Revision Set No.84
1. The structure of XeO3 is
(A) linear
(B) planar
(C) pyramidal
(D) T-shaped
2. XeF4 and XeF6 are expected to be
(A) oxidizing
(B) reducing
(C) unreactive
(D) strongly basic
3. STATEMENT-1
Micelles are formed by surfactant molecules above the critical miceller concentration (CMC).
Because
STATEMENT-2
The conductivity of a solution having surfactant molecules decreases sharply at the CMC.
(A) Statement-1 is True, Staement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Staement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
4. p-Hydroxybenzoic acid has a lower boiling point than o-hydroxybenzoic acid.
Because
STATEMENT-2
o-Hydroxybenzoic acid has intramolecular hydrogen bonding.
(A) Statement-1 is True, Staement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Staement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
5.
Match the chemical substances in Column I with type of polymers/type of bonds in Column II.
Column I -------Column II
Cellulose -- Synthetic polymer
Nylon-6, 6 -- Glycoside linkage
Protein-----Amide linkage
Sucrose---- Natural polymers
Source: 2007 JEE paper 1
(A) linear
(B) planar
(C) pyramidal
(D) T-shaped
2. XeF4 and XeF6 are expected to be
(A) oxidizing
(B) reducing
(C) unreactive
(D) strongly basic
3. STATEMENT-1
Micelles are formed by surfactant molecules above the critical miceller concentration (CMC).
Because
STATEMENT-2
The conductivity of a solution having surfactant molecules decreases sharply at the CMC.
(A) Statement-1 is True, Staement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Staement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
4. p-Hydroxybenzoic acid has a lower boiling point than o-hydroxybenzoic acid.
Because
STATEMENT-2
o-Hydroxybenzoic acid has intramolecular hydrogen bonding.
(A) Statement-1 is True, Staement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Staement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
5.
Match the chemical substances in Column I with type of polymers/type of bonds in Column II.
Column I -------Column II
Cellulose -- Synthetic polymer
Nylon-6, 6 -- Glycoside linkage
Protein-----Amide linkage
Sucrose---- Natural polymers
Source: 2007 JEE paper 1
IIT-JEE-Chemistry-Final Revision Set No.83
1. The percentage of p-character in the orbitals forming P-P bonds in P4 is
(A) 25 (B) 33
(C) 50 (D) 75
2. When 20g of naphthoic acid (C11H8O2) is dissolved in 50 g of benzene (Kf = 1.72 K kg mol-1), a freezing point depression of 2K is observed. The van't Hoff factor (i) is---?
3. STATEMENT-1
Boron always forms covalent bond
Because
STATEMENT-2
The small size of B3+ favours formation of covalent bond.
(A) Statement-1 is True, Staement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Staement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
4. STATEMENT-1
In water, orthoboric acid behaves as a weak monobasic acid.
Because
STATEMENT-2
In water, orthoboric acid acts as a proton donor.
(A) Statement-1 is True, Staement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Staement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
5. Argon is used in arc welding because of its
(A) low reactivity with metal
(B) ability to lower the melting point of metal
(C) flammability
(D) high calorific value
Source: JEE 2007 paper 1
(A) 25 (B) 33
(C) 50 (D) 75
2. When 20g of naphthoic acid (C11H8O2) is dissolved in 50 g of benzene (Kf = 1.72 K kg mol-1), a freezing point depression of 2K is observed. The van't Hoff factor (i) is---?
3. STATEMENT-1
Boron always forms covalent bond
Because
STATEMENT-2
The small size of B3+ favours formation of covalent bond.
(A) Statement-1 is True, Staement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Staement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
4. STATEMENT-1
In water, orthoboric acid behaves as a weak monobasic acid.
Because
STATEMENT-2
In water, orthoboric acid acts as a proton donor.
(A) Statement-1 is True, Staement-2 is True, Statement-2 is a correct explanation for statement-1.
(B) Statement-1 is True, Staement-2 is True, Statement-2 is not a correct explanation for statement-1.
(C) Statement-1 is True, Statement-2 is False
(D) Statement-1 is False, Statement-2 is True
5. Argon is used in arc welding because of its
(A) low reactivity with metal
(B) ability to lower the melting point of metal
(C) flammability
(D) high calorific value
Source: JEE 2007 paper 1
IIT-JEE-Chemistry-Final Revision Set No.82
1. Calculate velocity of electron in first Bohr orbit of hydrogen atom
(Given r = a0)
(b) Find de-Broglie wavelength of the electron in first Bohr orbit.
(c) Find the orbital angular momentum of 2p-orbital in terms of h/2π units.
(Source: Main JEE 2005)
2. The species having bond order different from that in CO is
(A) NO-
(B) NO+
(C) CN-
(D) N2
3. Among the following, the paramagnetic compound is
(A) Na2O2
(B) O3
(C) N2O
(D) KO2
4. Extraction of zinc from zinc blende is achieved by
(A) electrolytic reduction
(B) roasting followed by reduction with carbon
(C) roasting followed by reduction with another meal
(D) roasting followed by self-reduction
5. The number of structural isomers for C6H14 is
(A) 3
(B) 4
(C) 5
(D) 6
Source: 2007 JEE paper 1
(Given r = a0)
(b) Find de-Broglie wavelength of the electron in first Bohr orbit.
(c) Find the orbital angular momentum of 2p-orbital in terms of h/2π units.
(Source: Main JEE 2005)
2. The species having bond order different from that in CO is
(A) NO-
(B) NO+
(C) CN-
(D) N2
3. Among the following, the paramagnetic compound is
(A) Na2O2
(B) O3
(C) N2O
(D) KO2
4. Extraction of zinc from zinc blende is achieved by
(A) electrolytic reduction
(B) roasting followed by reduction with carbon
(C) roasting followed by reduction with another meal
(D) roasting followed by self-reduction
5. The number of structural isomers for C6H14 is
(A) 3
(B) 4
(C) 5
(D) 6
Source: 2007 JEE paper 1
IIT-JEE-Chemistry-Final Revision Set No.81
1. An element crystallizes in fcc lattice having edge length 400 pm. Calculate the maximum diameter of atom which can be placed in interstitial site without distorting the structure.
2. Predict whether the following molecules are iso-structural or not. Justify your answer.
(i) NMe3
(ii) N(SiMe3)3
3. Write balanced chemical equation for developing a black and white photographic film.
4. give reason why the solution of sodium thiosulphate on acidification turns milky white and give balance equation of this reaction.
5. 2X(g) → 3Y(g) + 2Z(g)
Time in minutes-----------------0------100-----200
Partial Pressure of X----------800-----400-----200
(in mm of Hg)
Assuming ideal gas condition calculate
1. Order of reaction
2. rate constant
3.Time taken for 75% completion
4. Total pressure when PP of X is 700 mm.
Source Main 2006
2. Predict whether the following molecules are iso-structural or not. Justify your answer.
(i) NMe3
(ii) N(SiMe3)3
3. Write balanced chemical equation for developing a black and white photographic film.
4. give reason why the solution of sodium thiosulphate on acidification turns milky white and give balance equation of this reaction.
5. 2X(g) → 3Y(g) + 2Z(g)
Time in minutes-----------------0------100-----200
Partial Pressure of X----------800-----400-----200
(in mm of Hg)
Assuming ideal gas condition calculate
1. Order of reaction
2. rate constant
3.Time taken for 75% completion
4. Total pressure when PP of X is 700 mm.
Source Main 2006
IIT-JEE-Chemistry-Final Revision Set No.80
1. When one mole of monoatomic ideal gas at T K undergoes adiabatic change under a constant external pressure of 1 atm and changes volume from 1 litre to 3 litre. Find the final temperature of the gas in kelvin.
2. Monomer A of a polymer of ozonolysis yields two moles of HCHO and one mole of CH3COCHO.
(a) Deduce the structure of A.
3. Calculate the amount of calcium oxide required when it reacts with 852 g of P4O10.
4. Write the structure of P4O10.
5. An element crystallizes in fcc lattice having edge length 400 pm. Calculate the maximum diameter of atom which can be placed in interstitial site without distorting the structure.
Source: IIT JEE Mains 2005
2. Monomer A of a polymer of ozonolysis yields two moles of HCHO and one mole of CH3COCHO.
(a) Deduce the structure of A.
3. Calculate the amount of calcium oxide required when it reacts with 852 g of P4O10.
4. Write the structure of P4O10.
5. An element crystallizes in fcc lattice having edge length 400 pm. Calculate the maximum diameter of atom which can be placed in interstitial site without distorting the structure.
Source: IIT JEE Mains 2005
IIT-JEE-Chemistry-Final Revision Set No.79
1. The two forms of D-glucopyranose obtained from the solution of D-glucose are called :
(a) isomer
(b) anomer
(c) epimer
(d) enantiomer
2. The number of radial nodes of 3s, and 2p orbitals are respectively :
(a) 2, 0
(b) 0, 2
(c) 1, 2
(d) 2, 1
3. A metal nitrate reacts with KI to give a black precipitate which on addition of excess of KI convert into orange colour solution. The cation of metal nitrate is:
(a) Hg2+
(b) Bi3+
(c) Pb2+
(d) Cu+
4. When phenyl magnesium bromide reacts with t-butanol, the product would be:
(a) benzene
(b) phenol
(c) t-butyl benzene
(d) t-butyl phenyl ether
5. The best method to prepare cyclohexene from cyclohexanol is by using :
(a) conc. HCI + ZnCl2
(b) conc. H3PO4
(c) HBr
(d) conc. HCI
Source: JEE screening 2005
(a) isomer
(b) anomer
(c) epimer
(d) enantiomer
2. The number of radial nodes of 3s, and 2p orbitals are respectively :
(a) 2, 0
(b) 0, 2
(c) 1, 2
(d) 2, 1
3. A metal nitrate reacts with KI to give a black precipitate which on addition of excess of KI convert into orange colour solution. The cation of metal nitrate is:
(a) Hg2+
(b) Bi3+
(c) Pb2+
(d) Cu+
4. When phenyl magnesium bromide reacts with t-butanol, the product would be:
(a) benzene
(b) phenol
(c) t-butyl benzene
(d) t-butyl phenyl ether
5. The best method to prepare cyclohexene from cyclohexanol is by using :
(a) conc. HCI + ZnCl2
(b) conc. H3PO4
(c) HBr
(d) conc. HCI
Source: JEE screening 2005
IIT-JEE-Chemistry-Final Revision Set No.78
1. In which of the following crystals alternate tetrahedral voids are occupied?
(a) NaCI
(b) ZnS
(c) CaF2
(d) Na2O
2.The elevation in boiling point of a solution of 20.16 g of CuCl2 in 1 kg of water will be:
(Molecular weight of CuCl2 = 134.4 and Kb = 0.52 Kg K mol-1)
(a) 0.075 °C
(b) 0.150 °C
(c) 0.468 °C
(d) 0.234 °C
3. Name of the structure of silicates in which three oxygen atoms of [SiO4]4– are shared is :
(a) pyrosilicate
(b) sheet silicate
(c) linear chain silicate
(d) three dimensional silicate
4. Lyophilic sols are :
(a) irreversible sols
(b) they are prepared from inorganic compounds
(c) coagulated by adding electrolytes
(d) self-stabilizing
5. Which pair of compounds is expected to show similar colour in aqueous medium?
(a) FeCI3 and CuCI2
(b) VOCI2 and CuCI2
(c) VOCI2 and FeCI2
(d) FeCI2 and MnCI2
Source: Screening JEE 2005
(a) NaCI
(b) ZnS
(c) CaF2
(d) Na2O
2.The elevation in boiling point of a solution of 20.16 g of CuCl2 in 1 kg of water will be:
(Molecular weight of CuCl2 = 134.4 and Kb = 0.52 Kg K mol-1)
(a) 0.075 °C
(b) 0.150 °C
(c) 0.468 °C
(d) 0.234 °C
3. Name of the structure of silicates in which three oxygen atoms of [SiO4]4– are shared is :
(a) pyrosilicate
(b) sheet silicate
(c) linear chain silicate
(d) three dimensional silicate
4. Lyophilic sols are :
(a) irreversible sols
(b) they are prepared from inorganic compounds
(c) coagulated by adding electrolytes
(d) self-stabilizing
5. Which pair of compounds is expected to show similar colour in aqueous medium?
(a) FeCI3 and CuCI2
(b) VOCI2 and CuCI2
(c) VOCI2 and FeCI2
(d) FeCI2 and MnCI2
Source: Screening JEE 2005
IIT-JEE-Chemistry-Final Revision Set No.77
1. How will you convert butan-2-one to propanoic acid?
(a) Tollen’s reagent
(b) Fehling solution
(c) NaOH/I2/H+
(d) NaOH/NaI/H+
2. Which blue-liquid is obtained on reacting equimolar amounts of two gases (N and O) at –30°C?
(a) N2O
(b) N2O3
(c) N2O4
(d) N2O5
3. Which of the following resonating structures of 1-methoxy-1, 3-butadiene is least stable?
(a) CH2—CH=CH—CH=O—CH3
(b) CH2=CH2—CH—CH=O—CH3
(c) CH2—CH—CH=CH—O—CH3
(d) CH2=CH—CH—CH—O—CH3
4. The ratio of the rate of diffusion of helium and methane under identical condition of pressure and temperature will be:
(a) 4
(b) 2
(c) 1
(d) 0.5
5. When PbO2 reacts with conc. HNO3 the gas evolved is:
(a) NO2
(b) O2
(c) N2
(d) N2O
Source JEE screening 2005
(a) Tollen’s reagent
(b) Fehling solution
(c) NaOH/I2/H+
(d) NaOH/NaI/H+
2. Which blue-liquid is obtained on reacting equimolar amounts of two gases (N and O) at –30°C?
(a) N2O
(b) N2O3
(c) N2O4
(d) N2O5
3. Which of the following resonating structures of 1-methoxy-1, 3-butadiene is least stable?
(a) CH2—CH=CH—CH=O—CH3
(b) CH2=CH2—CH—CH=O—CH3
(c) CH2—CH—CH=CH—O—CH3
(d) CH2=CH—CH—CH—O—CH3
4. The ratio of the rate of diffusion of helium and methane under identical condition of pressure and temperature will be:
(a) 4
(b) 2
(c) 1
(d) 0.5
5. When PbO2 reacts with conc. HNO3 the gas evolved is:
(a) NO2
(b) O2
(c) N2
(d) N2O
Source JEE screening 2005
IIT-JEE-Chemistry-Final Revision Set No.76
1. Which species has the maximum number of lone pair of electrons on the central atom?
(a) [ClO3-]
(b) XeF4
(c) SF4
(d) [I3-]
2. Which kinds of isomerism is exhibited by octahedral Co(NH3)4 Br2CI?
(a) Geometrical and ionization
(b) Geometrical and optical
(c) Optical and ionization
(d) Geometrical only
3. Which ore contains both Iron and Copper?
(a) Cuprite
(b) Chalcocite
(c) Chalcopyrite
(d) Malachite
4. Which of the following is not oxidised by O3?
(a) KI
(b) FeSO4
(c) KMnO4
(d) K2MnO4
5. Which one of the following statement for order of reaction is not correct?
(a) Order can be determined experimentally
(b) Order of reaction is equal to sum of the power of concentration terms in differential rate law
(c) It is not affected with stiochiometric coefficient of the reactants
(d) Order can not be fractional
Source: Screening Jee 2005
(a) [ClO3-]
(b) XeF4
(c) SF4
(d) [I3-]
2. Which kinds of isomerism is exhibited by octahedral Co(NH3)4 Br2CI?
(a) Geometrical and ionization
(b) Geometrical and optical
(c) Optical and ionization
(d) Geometrical only
3. Which ore contains both Iron and Copper?
(a) Cuprite
(b) Chalcocite
(c) Chalcopyrite
(d) Malachite
4. Which of the following is not oxidised by O3?
(a) KI
(b) FeSO4
(c) KMnO4
(d) K2MnO4
5. Which one of the following statement for order of reaction is not correct?
(a) Order can be determined experimentally
(b) Order of reaction is equal to sum of the power of concentration terms in differential rate law
(c) It is not affected with stiochiometric coefficient of the reactants
(d) Order can not be fractional
Source: Screening Jee 2005
IIT-JEE-Chemistry-Final Revision Set No.75
1. 7-bromo-1, 3, 5-cycloheptatriene exists as ionic species in aqueous solution
while 5-bromo-1, 3 cyclopentadiene doesn't ionize even in presence of
Ag+ (aq). Explain.
2. On the basis of ground state electronic configuration arrange the following
molecules in increasing O-O bond length order.
KO2, O2, O2[AsF6]
3. In the following equilibrium
N2O4(g) <--> 2NO2(g)
When 5 moles of each are taken, the temperature is kept at 298 K the total
pressure was found to be 20 bar. Given that
△Gf0(N2O4) = 100 kJ
△Gf0(NO2) = 50 kJ
(i) Find △G of the reaction
(ii) The direction of the reaction in which the equilibrium shifts
4. A1 and A2 are two ores of metal M. A1 on calcinations gives black precipitate,
CO2 and water. Find A1
5. An organic compound 'P' having the molecular formula C5H10O treated with
dil H2SO4 gives two compounds, Q and R both gives positive idoform test.
The reaction of C5H10O with dil H2SO4 gives reaction 1015 times faster than
ethylene. Identify organic compound of Q and R.
Source Main 2004 JEE
while 5-bromo-1, 3 cyclopentadiene doesn't ionize even in presence of
Ag+ (aq). Explain.
2. On the basis of ground state electronic configuration arrange the following
molecules in increasing O-O bond length order.
KO2, O2, O2[AsF6]
3. In the following equilibrium
N2O4(g) <--> 2NO2(g)
When 5 moles of each are taken, the temperature is kept at 298 K the total
pressure was found to be 20 bar. Given that
△Gf0(N2O4) = 100 kJ
△Gf0(NO2) = 50 kJ
(i) Find △G of the reaction
(ii) The direction of the reaction in which the equilibrium shifts
4. A1 and A2 are two ores of metal M. A1 on calcinations gives black precipitate,
CO2 and water. Find A1
5. An organic compound 'P' having the molecular formula C5H10O treated with
dil H2SO4 gives two compounds, Q and R both gives positive idoform test.
The reaction of C5H10O with dil H2SO4 gives reaction 1015 times faster than
ethylene. Identify organic compound of Q and R.
Source Main 2004 JEE
IIT-JEE-Chemistry-Final Revision Set No.74
1. Give the reaction of L-Glucose with Tollen's reagent.
2.Draw Newmann's projection the less stable staggered form of
butane.
3. Arrange the following oxides in the increasing order of Bronsted basicity.
CI2O7, BaO, SO3, CO2, B2O3
4. The crystal AB (rock salt structure) has molecular weight 6.023 y amu.
Where y is an arbitrary number in amu. If the minimum distance between
cation and anion is y1/3 nm and the observed density is 20 kg/m3. Find the:
(a) density in kg/m3 and
(b) type of defect
Source 2004 main JEE
2.Draw Newmann's projection the less stable staggered form of
butane.
3. Arrange the following oxides in the increasing order of Bronsted basicity.
CI2O7, BaO, SO3, CO2, B2O3
4. The crystal AB (rock salt structure) has molecular weight 6.023 y amu.
Where y is an arbitrary number in amu. If the minimum distance between
cation and anion is y1/3 nm and the observed density is 20 kg/m3. Find the:
(a) density in kg/m3 and
(b) type of defect
Source 2004 main JEE
IIT-JEE-Chemistry-Final Revision Set No.73
1. Number of lone pair (s) in XeF4 is/are
(a) 0
(b) 1
(c) 2
(d) 3
2. 0.004 M Na2SO4 is isotonic with 0.01 M glucose. Degree of dissociation of
Na2SO4 is
(a) 75%
(b) 50%
(c) 25%
(d) 85%
3. 100 mL of a liquid contained in an insulated container at a pressure of 1 bar.
The pressure is steeply increased to 100 bar. The volume of the liquid is
decreased by 1 mL at this constant pressure. Find the DH and DU.
4. Draw the shape of XeF4 according to VSEPR theory. Show the lone
pair of electrons on the central atom.
5. Draw the shape of OSF4 according to VSEPR theory. Show the lone
pair of electrons on the central atom.
Source
1,2 screening 2004
3,4,5 main 2004 JEE
(a) 0
(b) 1
(c) 2
(d) 3
2. 0.004 M Na2SO4 is isotonic with 0.01 M glucose. Degree of dissociation of
Na2SO4 is
(a) 75%
(b) 50%
(c) 25%
(d) 85%
3. 100 mL of a liquid contained in an insulated container at a pressure of 1 bar.
The pressure is steeply increased to 100 bar. The volume of the liquid is
decreased by 1 mL at this constant pressure. Find the DH and DU.
4. Draw the shape of XeF4 according to VSEPR theory. Show the lone
pair of electrons on the central atom.
5. Draw the shape of OSF4 according to VSEPR theory. Show the lone
pair of electrons on the central atom.
Source
1,2 screening 2004
3,4,5 main 2004 JEE
IIT-JEE-Chemistry-Final Revision Set No.72
1. 2 mol of an ideal gas expanded isothermally and reversibly from 1litre to 10
litres at 300 K. What is the enthalpy change?
(a) 4.98 kJ
(b) 11.47 kJ
(c) -11.47 kJ
(d) 0 kJ
2. 2-hexyne gives trans-2-hexene on treatment with
(a) Li/NH3
(b) Pd/BaSO4
(c) LiAIH4
(d) Pt/H2
3. How many chiral compounds are possible on mono chlorination of 2-methyl
butane?
(a) 2
(b) 4
(c) 6
(d) 8
4. Which of the following pairs give positive Tollen's test?
(a) Glucose, sucrose
(b) Glucose, fructose
(c) Hexanal, acetophenone
(d) Fructose, sucrose
5. Which of the following as -O-O- linkage
(a) H2S2O6
(b) H2S2O8
(c) H2S2O3
(d) H2S5O6
source JEE 200 screening
litres at 300 K. What is the enthalpy change?
(a) 4.98 kJ
(b) 11.47 kJ
(c) -11.47 kJ
(d) 0 kJ
2. 2-hexyne gives trans-2-hexene on treatment with
(a) Li/NH3
(b) Pd/BaSO4
(c) LiAIH4
(d) Pt/H2
3. How many chiral compounds are possible on mono chlorination of 2-methyl
butane?
(a) 2
(b) 4
(c) 6
(d) 8
4. Which of the following pairs give positive Tollen's test?
(a) Glucose, sucrose
(b) Glucose, fructose
(c) Hexanal, acetophenone
(d) Fructose, sucrose
5. Which of the following as -O-O- linkage
(a) H2S2O6
(b) H2S2O8
(c) H2S2O3
(d) H2S5O6
source JEE 200 screening
IIT-JEE-Chemistry-Final Revision Set No.71
1. Spontaneous adsorption of a gas on solid surface is an exothermic process
because:
(a) DH increases for system
(b) DS increases for gas
(c) DS decreases for gas
(d) DG increases for gas
2. Spin only magnetic moment of the compound Hg[Co(SCN)4] is
(a) √3
(b) √15
(c) √24
(d) √8
3. Which hydrogen like species will have same radius as that of Bohr orbit of
hydrogen atom?
(a) n = 2, Li+2
(b) n = 2, Be3+
(c) n = 2, He+
(d) n = 3, Li2+
4. A sodium salt of an unknown anion when treated with MgCI2 gives white
precipitate only on boiling. The anion is
(a) S42-
(b) HC3-
(c) C32-
(d) N3-
5. 0.004 M Na2SO4 is isotonic with 0.01 M glucose. Degree of dissociation of
Na2SO4 is
(a) 75%
(b) 50%
(c) 25%
(d) 85%
because:
(a) DH increases for system
(b) DS increases for gas
(c) DS decreases for gas
(d) DG increases for gas
2. Spin only magnetic moment of the compound Hg[Co(SCN)4] is
(a) √3
(b) √15
(c) √24
(d) √8
3. Which hydrogen like species will have same radius as that of Bohr orbit of
hydrogen atom?
(a) n = 2, Li+2
(b) n = 2, Be3+
(c) n = 2, He+
(d) n = 3, Li2+
4. A sodium salt of an unknown anion when treated with MgCI2 gives white
precipitate only on boiling. The anion is
(a) S42-
(b) HC3-
(c) C32-
(d) N3-
5. 0.004 M Na2SO4 is isotonic with 0.01 M glucose. Degree of dissociation of
Na2SO4 is
(a) 75%
(b) 50%
(c) 25%
(d) 85%
IIT-JEE-Chemistry-Final Revision Set No.70
1. 2-phenyl propene on acidic hydration gives
(a) 2-phenyl-2-propanol
(b) 2-phenyl-1-propanol
(c) 3-phenyl-1-propanol
(d) 1-phenyl-2-propanol
2. The methods chiefly used for the extraction of lead and tin from their ores
are respectively
(a) Self reduction and carbon reduction
(b) Self reduction and electrolytic reduction
(c) Carbon reduction and self reduction
(d) Cyanide process and carbon reduction
3. Benzamide on treatment with POCl3 gives
(a) Aniline
(b) Benzonitrile
(c) Chlorobenzene
(d) Benzyl amine
4. (NH4)2 Cr2O7 on heating gives a gas which is also given by
(a) Heating NH4NO2
(b) Heating NH4NO3
(c) Mg3N2 + H2O
(d) Na(comp.) + H2O2
5. HX is a weak acid (Kap =5). It forms a salt NaX (0.1M) on reacting with caustic soda. The degree of hydrolysis of NaX is
(a) 0.01 %
(b) 0.001 %
(c) 0.1 %
(d) 0.15%
Source: JEE 2004 screening
(a) 2-phenyl-2-propanol
(b) 2-phenyl-1-propanol
(c) 3-phenyl-1-propanol
(d) 1-phenyl-2-propanol
2. The methods chiefly used for the extraction of lead and tin from their ores
are respectively
(a) Self reduction and carbon reduction
(b) Self reduction and electrolytic reduction
(c) Carbon reduction and self reduction
(d) Cyanide process and carbon reduction
3. Benzamide on treatment with POCl3 gives
(a) Aniline
(b) Benzonitrile
(c) Chlorobenzene
(d) Benzyl amine
4. (NH4)2 Cr2O7 on heating gives a gas which is also given by
(a) Heating NH4NO2
(b) Heating NH4NO3
(c) Mg3N2 + H2O
(d) Na(comp.) + H2O2
5. HX is a weak acid (Kap =5). It forms a salt NaX (0.1M) on reacting with caustic soda. The degree of hydrolysis of NaX is
(a) 0.01 %
(b) 0.001 %
(c) 0.1 %
(d) 0.15%
Source: JEE 2004 screening
IIT-JEE-Chemistry-Final Revision Set No.69
1. In the process of extraction of gold,
Roasted gold ore + CN- + H2O → O2 → [X] + OH-
[X] + Zn → [Y] + Au
Identify the complexes [X] and [Y] :
(a) X = [Au(CN)2]-, Y = [Zn(CN)4]2-
(b) X = [Au(CN)4]3-, Y = [Zn(CN)4]2-
(c) X = [Au(CN)2]-, Y = [Zn(CN)6]4-
(d) X = [Au(CN)4]-, Y = [Zn(CN)4]2-
2. Positive deviation from ideal behaviour takes place because of :
(a) Molecular interaction between atom and PV/nRT > 1.
(b) Molecular interaction between atom and PV/nRT is l.t. 1.
(c) Finite size of atom and PV/nRT > 1
(d) Finite size of atoms and PV/nRT is l.t. 1
3. An enantiomerically pure acid is treated with racemic mixture of an alcohol having one chiral carbon. The ester formed will be:
(a) Optically active mixture
(b) Pure enantiomer
(c) Meso Compound
(d) Racemic mixture
4. Calculate the molarity of water if its density is 1000 kg/m3.
5. The average velocity of gas molecules is 400 m/sec. Calculate its rms velocity at the same temperature.
Roasted gold ore + CN- + H2O → O2 → [X] + OH-
[X] + Zn → [Y] + Au
Identify the complexes [X] and [Y] :
(a) X = [Au(CN)2]-, Y = [Zn(CN)4]2-
(b) X = [Au(CN)4]3-, Y = [Zn(CN)4]2-
(c) X = [Au(CN)2]-, Y = [Zn(CN)6]4-
(d) X = [Au(CN)4]-, Y = [Zn(CN)4]2-
2. Positive deviation from ideal behaviour takes place because of :
(a) Molecular interaction between atom and PV/nRT > 1.
(b) Molecular interaction between atom and PV/nRT is l.t. 1.
(c) Finite size of atom and PV/nRT > 1
(d) Finite size of atoms and PV/nRT is l.t. 1
3. An enantiomerically pure acid is treated with racemic mixture of an alcohol having one chiral carbon. The ester formed will be:
(a) Optically active mixture
(b) Pure enantiomer
(c) Meso Compound
(d) Racemic mixture
4. Calculate the molarity of water if its density is 1000 kg/m3.
5. The average velocity of gas molecules is 400 m/sec. Calculate its rms velocity at the same temperature.
IIT-JEE-Chemistry-Final Revision Set No.68
1. In the electrolytic cell, flow of electrons is from :
(a) cathode to anode in solution
(b) cathode to anode through external supply
(c) cathode to anode through internal supply
(d) anode to cathode through internal supply
2. In a first order reaction the concentration of reactant decreases from 800 mol/dm3 to 50 mol/dm3 is 2 × 104 sec. The rate constant of reaction in sec-1 is :
(a) 2 × 104
(b) 3.45 × 10-5
(c) 1.386 × 10-5
(d) 2 × 10-4
3. During depression of freezing point in a solution the following are in equilibrium :
(a) liquid solvent, solid solvent
(b) liquid solvent, solid solute
(c) liquid solute, solid solute
(d) liquid solute solid solvent
4. H3BO3 is :
(a) Monobasic and weak Lewis acid
(b) Monobasic and weak Bronsted acid
(c) Monobasic and strong Lewis acid
(d) Tribasic and weak Bronsted acid
5. 23Na is the more stable isotope of Na. Find out the process by which 24Na can undergo radioactive decay:
(a) b- emission
(b) a emission
(c) b+ emission
(d) K electron capture
Screening JEE 2003
(a) cathode to anode in solution
(b) cathode to anode through external supply
(c) cathode to anode through internal supply
(d) anode to cathode through internal supply
2. In a first order reaction the concentration of reactant decreases from 800 mol/dm3 to 50 mol/dm3 is 2 × 104 sec. The rate constant of reaction in sec-1 is :
(a) 2 × 104
(b) 3.45 × 10-5
(c) 1.386 × 10-5
(d) 2 × 10-4
3. During depression of freezing point in a solution the following are in equilibrium :
(a) liquid solvent, solid solvent
(b) liquid solvent, solid solute
(c) liquid solute, solid solute
(d) liquid solute solid solvent
4. H3BO3 is :
(a) Monobasic and weak Lewis acid
(b) Monobasic and weak Bronsted acid
(c) Monobasic and strong Lewis acid
(d) Tribasic and weak Bronsted acid
5. 23Na is the more stable isotope of Na. Find out the process by which 24Na can undergo radioactive decay:
(a) b- emission
(b) a emission
(c) b+ emission
(d) K electron capture
Screening JEE 2003
IIT-JEE-Chemistry-Final Revision Set No.67
1. Among the following the molecule with the highest dipole moment is :
(a) CH3CI
(b) CH2CI2
(c) CHCI3
(d) CCI4
2. For H3PO3 and H3PO4 the correct choice is:
(a) H3PO3 is dibasic and reducing
(b) H3PO3 is dibasic and non-reducing
(c) H3PO4 is tribasic and reducing
(d) H3PO3 is tribasic and non-reducing
3. When MnO2 is fused with KOH, a coloured compound is formed, the product and its colour is :
(a) K2MnO4, purple green
(b) KMnO4, purple
(c) Mn2O3, brown
(d) Mn3O4 black
4. Rate of physiorption increases with :
(a) decrease in temperature
(b) increase in temperature
(c) decrease in pressure
(d) decrease in surface area
5. Which has maximum number of atoms?
(a) 24g of C
(b) 56 g of Fe
(c) 27g of Al
(d) 108 g of Ag
(a) CH3CI
(b) CH2CI2
(c) CHCI3
(d) CCI4
2. For H3PO3 and H3PO4 the correct choice is:
(a) H3PO3 is dibasic and reducing
(b) H3PO3 is dibasic and non-reducing
(c) H3PO4 is tribasic and reducing
(d) H3PO3 is tribasic and non-reducing
3. When MnO2 is fused with KOH, a coloured compound is formed, the product and its colour is :
(a) K2MnO4, purple green
(b) KMnO4, purple
(c) Mn2O3, brown
(d) Mn3O4 black
4. Rate of physiorption increases with :
(a) decrease in temperature
(b) increase in temperature
(c) decrease in pressure
(d) decrease in surface area
5. Which has maximum number of atoms?
(a) 24g of C
(b) 56 g of Fe
(c) 27g of Al
(d) 108 g of Ag
IIT-JEE-Chemistry-Final Revision Set No.66
1. How is boron obtained from borax? Give chemical equations with reaction conditions.
2. When a white crystalline compound X is heated with K2Cr2O7 and concentrated H2SO4 a reddish brown gas A is evolved. On passing A into caustic soda solution, a yellow coloured solution of B is obtained. Neutralizing the solution of B with acetic acid and on subsequent addition of lead acetate a yellow precipitate C is obtained. When X is heated with NaOH solution, a colourless has is evolved and on passing this gas into K2HgI4 solution, a reddish brown precipitate D is formed. Identify A, B, C, D and X.
3. A biologically active compound, Bombykol (C16H30O) is obtained from a natural source. The structure of the compound is determine by the following reactions.
(a) On hydrogenation, Bombykol gives a compound A, C16H34O, which reacts with acetic anhydride to give an ester,
(b) Bombykol also reacts with acetic hydride to give another ester, which on oxidative ozonolysis (O3/H2O2) gives a mixture of butanoic acid, oxalic acid and 10-acetoxy decanoic acid.
Determine the number of double bonds in Bombykol.
4. Two moles of a perfect gas undergo the following processes:
(a) a reversible isobaric expansion from (1.0 atm, 20.0 L) to (1.0 atm, 40.0 L);
(b) a reversible isochoric change state from (1.0 atm, 40.0 L) to (0.5 atm, 40.0 L);
(c) a reversible isothermal compression from (0.5 atm, 40.0 L) to (1.0 atm, 20.0 L);
(ii) Calculate the total work (w) and the total heat change (q) involved in the above processes.
2. When a white crystalline compound X is heated with K2Cr2O7 and concentrated H2SO4 a reddish brown gas A is evolved. On passing A into caustic soda solution, a yellow coloured solution of B is obtained. Neutralizing the solution of B with acetic acid and on subsequent addition of lead acetate a yellow precipitate C is obtained. When X is heated with NaOH solution, a colourless has is evolved and on passing this gas into K2HgI4 solution, a reddish brown precipitate D is formed. Identify A, B, C, D and X.
3. A biologically active compound, Bombykol (C16H30O) is obtained from a natural source. The structure of the compound is determine by the following reactions.
(a) On hydrogenation, Bombykol gives a compound A, C16H34O, which reacts with acetic anhydride to give an ester,
(b) Bombykol also reacts with acetic hydride to give another ester, which on oxidative ozonolysis (O3/H2O2) gives a mixture of butanoic acid, oxalic acid and 10-acetoxy decanoic acid.
Determine the number of double bonds in Bombykol.
4. Two moles of a perfect gas undergo the following processes:
(a) a reversible isobaric expansion from (1.0 atm, 20.0 L) to (1.0 atm, 40.0 L);
(b) a reversible isochoric change state from (1.0 atm, 40.0 L) to (0.5 atm, 40.0 L);
(c) a reversible isothermal compression from (0.5 atm, 40.0 L) to (1.0 atm, 20.0 L);
(ii) Calculate the total work (w) and the total heat change (q) involved in the above processes.
IIT-JEE-Chemistry-Final Revision Set No.65
Write balanced equations for the reactions of the following compounds with water:
(i) Al4C3
(ii) CaNCN
(iii) BF3
(iv) NCl3
(v) XeF4
(i) Al4C3
(ii) CaNCN
(iii) BF3
(iv) NCl3
(v) XeF4
IIT-JEE-Chemistry-Final Revision Set No.64
1. 500 mL of 0.2 M aqueous solution of acetic acid is mixed with 500 mL of 0.2 M HCI at 250°C.
Calculate the degree of dissociation of acetic acid in the resulting solution and pH of the solution.
2. The density of the vapour of a substance at 1 atm pressure and 500 K is 0.36 kg m-3. The vapour effuses through a small hole at a rate of 1.33 times faster than oxygen under the same condition.
(a) Determine (i) molecular weight, (ii) molar volume, (iii) compression factor (Z) of the vapour and (iv) which forces among the gas molecules are dominating, the attractive or the repulsive?
(b) If the vapour behaves ideally at 1000 K, determine the average translational kinetic energy of a molecule.
Calculate the degree of dissociation of acetic acid in the resulting solution and pH of the solution.
2. The density of the vapour of a substance at 1 atm pressure and 500 K is 0.36 kg m-3. The vapour effuses through a small hole at a rate of 1.33 times faster than oxygen under the same condition.
(a) Determine (i) molecular weight, (ii) molar volume, (iii) compression factor (Z) of the vapour and (iv) which forces among the gas molecules are dominating, the attractive or the repulsive?
(b) If the vapour behaves ideally at 1000 K, determine the average translational kinetic energy of a molecule.
IIT-JEE-Chemistry-Final Revision Set No.63
Five isomeric para-disubstituted aromatic compounds A to E with molecular formula C8H8O2 were given for identification. Based on the following observation, give structures of the compounds.
(i) Both A and B from a silver mirror with Tollen's reagent; also, B gives a positive test with FeCI3 solution.
(ii) C gives positive idoform test.
(iii) D is readily extracted in aqueous NaHCO3 solution.
(iv) E on acid hydrolysis gives 1, 4-dihydroxybenzene.
Source 2002 JEE mains
(i) Both A and B from a silver mirror with Tollen's reagent; also, B gives a positive test with FeCI3 solution.
(ii) C gives positive idoform test.
(iii) D is readily extracted in aqueous NaHCO3 solution.
(iv) E on acid hydrolysis gives 1, 4-dihydroxybenzene.
Source 2002 JEE mains
IIT-JEE-Chemistry-Final Revision Set No.62
1. An aqueous solution of a substance gives a white precipitate on treatment with dilute hydrochloric acid, which dissolves on heating. When hydrogen sulfide is passed through the hot acidic solution, a black precipitate is obtained. The substance is a
(A) Hg22+ salt
(B) Cu2+ salt
(C) Ag+ salt
(D) Pb2+ salt
2. Which of the following process is used in extractive metallurgy of magnesium?
(A) Fused salt electrolysis
(B) Self reduction
(C) Aqueous solution electrolysis
(D) Thermite reduction
3. Identify the correct order of solubility of Na2S, CuS and ZnS in aqueous medium
(A) CuS > ZnS > Na2S
(B) ZnS > Na2S > CuS
(C) Na2S > CuS > ZnS
(D) Na2S > ZnS > CuS
4. Anhydrous ferric chloride is prepared by
(A) Heating hydrated ferric chloride at a high temperature in a stream of air
(B) Heating metallic iron in a stream of dry chlorine gas
(C) Reaction of ferric oxide with hydrochloric acid
(D) Reaction of metallic iron with hydrochloric acid
5. How many bond pairs and lone pairs are there in XeF4?
Source: JEE 2002 for 1 to 4
(A) Hg22+ salt
(B) Cu2+ salt
(C) Ag+ salt
(D) Pb2+ salt
2. Which of the following process is used in extractive metallurgy of magnesium?
(A) Fused salt electrolysis
(B) Self reduction
(C) Aqueous solution electrolysis
(D) Thermite reduction
3. Identify the correct order of solubility of Na2S, CuS and ZnS in aqueous medium
(A) CuS > ZnS > Na2S
(B) ZnS > Na2S > CuS
(C) Na2S > CuS > ZnS
(D) Na2S > ZnS > CuS
4. Anhydrous ferric chloride is prepared by
(A) Heating hydrated ferric chloride at a high temperature in a stream of air
(B) Heating metallic iron in a stream of dry chlorine gas
(C) Reaction of ferric oxide with hydrochloric acid
(D) Reaction of metallic iron with hydrochloric acid
5. How many bond pairs and lone pairs are there in XeF4?
Source: JEE 2002 for 1 to 4
IIT-JEE-Chemistry-Final Revision Set No.61
1. Which of the following compounds exhibits steroisomerism?
(A) 2-methylbutene- 1
(B) 3-methylbutyne-1
(C) 3-methylbutanoic acid
(D) 2-mtethylbutanoic acid
2. The nodal plane in the Pi(Π)-bond of ethane is located in
(A) The molecular plane
(B) A plane parallel to the molecular plane
(C) A plane perpendicular to the molecular plane which bisects the carbon - carbon σ-bond at right angle
(D) A plane perpendicular to the molecular plane which contains the carbon - carbon σ-bond
3. Polyphosphates are used as water softening agents because they
(A) Form soluble complexes with anionic species
(B) Precipitate anionic species
(C) Form soluble complexes with cationic species
(D) Precipitate cationic species
4. Identify the least stable ion amongst the following
(A) Li-
(B) Be-
(C) B-
(D) C-
5. A gas 'X' is passed through water to form a saturated solution. The aqueous solution of treatment with silver nitrate gives a white precipitate. The saturated aqueous solution also dissolves magnesium ribbon with evolution of a colourless gas 'Y'. Identify 'X' and 'Y'.
(A) X =CO2, Y= Cl2
(B) X =Cl2, Y= CO2
(C) X =Cl2, Y= H2
(D) X =H2, Y= Cl2
JEE 2002 Screening
(A) 2-methylbutene- 1
(B) 3-methylbutyne-1
(C) 3-methylbutanoic acid
(D) 2-mtethylbutanoic acid
2. The nodal plane in the Pi(Π)-bond of ethane is located in
(A) The molecular plane
(B) A plane parallel to the molecular plane
(C) A plane perpendicular to the molecular plane which bisects the carbon - carbon σ-bond at right angle
(D) A plane perpendicular to the molecular plane which contains the carbon - carbon σ-bond
3. Polyphosphates are used as water softening agents because they
(A) Form soluble complexes with anionic species
(B) Precipitate anionic species
(C) Form soluble complexes with cationic species
(D) Precipitate cationic species
4. Identify the least stable ion amongst the following
(A) Li-
(B) Be-
(C) B-
(D) C-
5. A gas 'X' is passed through water to form a saturated solution. The aqueous solution of treatment with silver nitrate gives a white precipitate. The saturated aqueous solution also dissolves magnesium ribbon with evolution of a colourless gas 'Y'. Identify 'X' and 'Y'.
(A) X =CO2, Y= Cl2
(B) X =Cl2, Y= CO2
(C) X =Cl2, Y= H2
(D) X =H2, Y= Cl2
JEE 2002 Screening
IIT-JEE-Chemistry-Final Revision Set No.60
1. One mole of a non-ideal gas undergoes a change of state (2.0 atm. 3.0 L, 95 K ) → (4.0 atm. 5.0 L, 245 K) with a change in internal energy , DU = 30.0L atm. The change in enthalpy (ΔH) of the process in L atm is
(A) 40.0
(B) 42.0
(C) 44.0
(D) Not defined, because pressure is not constant
2. Specify the coordination geometry around and hybridization of N and B atoms in a 1:1 complex of BF3 and NH3
(A) N: tetrahedral , sp3 ; B: tetrahedral, sp3
(B) N: pyramidal, sp3 ; B: pyramidal, sp3
(C) N: pyramidal, sp3 ; B: planar, sp2
(D) N: pyramidal, sp3 ; B: tetrahedral, sp3
3. Consider the following equilibrium in a closed container
N2O4 (g) <--> 2NO2
At a fixed temperature, the volume of the reaction container is halved. For this change, which of the following holds true regarding the equilibrium constant (Kp) and degree of dissociation (α)?
(A) Neither KP nor α change
(B) Both KP and α change
(C) KP changes, but α does not change
(D) KP does not change, but α change
4. Identify a reagent from the following list which can easily distinguish between 1-butyne and 2-butyne
(A) Bromine, CCl4
(B) H2, Lindlar catalyst
(C) Dilute H2SO4, HgSO4
(D) Ammoniacal CuCl2 solution
5. Which of the following acids has the smallest dissociation constant?
(A) CH3CHFCOOH
(B) FCH2CH2COOH
(C) BrCH2CH2COOH
(D) CH3CHBrCOOH
(A) 40.0
(B) 42.0
(C) 44.0
(D) Not defined, because pressure is not constant
2. Specify the coordination geometry around and hybridization of N and B atoms in a 1:1 complex of BF3 and NH3
(A) N: tetrahedral , sp3 ; B: tetrahedral, sp3
(B) N: pyramidal, sp3 ; B: pyramidal, sp3
(C) N: pyramidal, sp3 ; B: planar, sp2
(D) N: pyramidal, sp3 ; B: tetrahedral, sp3
3. Consider the following equilibrium in a closed container
N2O4 (g) <--> 2NO2
At a fixed temperature, the volume of the reaction container is halved. For this change, which of the following holds true regarding the equilibrium constant (Kp) and degree of dissociation (α)?
(A) Neither KP nor α change
(B) Both KP and α change
(C) KP changes, but α does not change
(D) KP does not change, but α change
4. Identify a reagent from the following list which can easily distinguish between 1-butyne and 2-butyne
(A) Bromine, CCl4
(B) H2, Lindlar catalyst
(C) Dilute H2SO4, HgSO4
(D) Ammoniacal CuCl2 solution
5. Which of the following acids has the smallest dissociation constant?
(A) CH3CHFCOOH
(B) FCH2CH2COOH
(C) BrCH2CH2COOH
(D) CH3CHBrCOOH
IIT-JEE-Chemistry-Final Revision Set No.59
1. If the Nitrogen atom had electronic configuration 1s7, it would have energy lower than that of the normal ground state configuration 1s2 2s2 2p3, because the electrons would be closer to the nucleus. Yet 1s7 is not observed because it violates
(A) Heisenberg uncertainty principle
(B) Hund's rule
(C) Pauli exclusion principle
(D) Bohr postulate of stationary orbits
2. Rutherford's experiment , which established the nuclear model of the atom, used a beam of
(A) β-particles , which impinged on a metal foil and got absorbed
(B) γ-rays, which impinged on a metal foil and got scattered
(C) Helium atoms , which impinged on a metal foil and got scattered
(D) Helium nuclei , which impinged on a metal foil and got scattered
3. When the temperature is increased, surface tension of water
(A) Increases
(B) Decreases
(C) Remains constant
(D) Shows irregular behaviour
4. A substance AX BY crystallizes in a face centered cubic (FCC) lattice in which atoms 'A' occupy each corner of the cube and atoms 'B' occupy the centers of each face of the cube. Identify the correct composition of the substance AX BY
(A) AB3
(B) A4B3
(C) A3B
(D) Composition cannot be specified
5. Consider the chemical reaction N2(g) + 3H2(g) --> 2NH3(g). The rate of this reaction can be expressed in terms of time derivative of concentration of N2(g), H2(g), or NH3(g). Identify the correct relationship amongst the rate expressions
(A) Rate = -d[N2]/dt = -1/3 d[H2] /dt = 1/2 d[NH3] /dt
(B) Rate = -d[N2]/dt = -3 d[H2] /dt = 2 d[NH3] /dt
(C) Rate = d[N2]/dt = 1/3 d[H2] /dt = 1/2 d[NH3] /dt
(D) Rate = -d[N2]/dt = - d[H2] /dt = d[NH3] /dt
Source: JEE 2002 screening
(A) Heisenberg uncertainty principle
(B) Hund's rule
(C) Pauli exclusion principle
(D) Bohr postulate of stationary orbits
2. Rutherford's experiment , which established the nuclear model of the atom, used a beam of
(A) β-particles , which impinged on a metal foil and got absorbed
(B) γ-rays, which impinged on a metal foil and got scattered
(C) Helium atoms , which impinged on a metal foil and got scattered
(D) Helium nuclei , which impinged on a metal foil and got scattered
3. When the temperature is increased, surface tension of water
(A) Increases
(B) Decreases
(C) Remains constant
(D) Shows irregular behaviour
4. A substance AX BY crystallizes in a face centered cubic (FCC) lattice in which atoms 'A' occupy each corner of the cube and atoms 'B' occupy the centers of each face of the cube. Identify the correct composition of the substance AX BY
(A) AB3
(B) A4B3
(C) A3B
(D) Composition cannot be specified
5. Consider the chemical reaction N2(g) + 3H2(g) --> 2NH3(g). The rate of this reaction can be expressed in terms of time derivative of concentration of N2(g), H2(g), or NH3(g). Identify the correct relationship amongst the rate expressions
(A) Rate = -d[N2]/dt = -1/3 d[H2] /dt = 1/2 d[NH3] /dt
(B) Rate = -d[N2]/dt = -3 d[H2] /dt = 2 d[NH3] /dt
(C) Rate = d[N2]/dt = 1/3 d[H2] /dt = 1/2 d[NH3] /dt
(D) Rate = -d[N2]/dt = - d[H2] /dt = d[NH3] /dt
Source: JEE 2002 screening
IIT-JEE-Chemistry-Final Revision Set No.58
Use the following key to choose the appropriate answer.
(a) If both assertion and reason are CORRECT, and reason is the CORRECT explanation of the assertion.
(b) If both assertion and reason are CORRECT, but reason is NOT the CORRECT explanation of the assertion.
(c) If assertion is CORRECT, but reason is INCORRECT.
(d) If assertion is INCORRECT, but reason is CORRECT.
1.
Dimethylsulphide is commonly used for the reduction of an ozonide of an alkene to get the carbonyl compounds.
It reduces the ozonide giving water soluble dimethyl sulphoxide and excess of it evaporates.
2.
Addition of bromine to trans-2-butene yields meso-2, 3-dibromobutane.
Bromine addition to an alkene is an electrophilic addition.
3.
Between SiCl4 and CCl4, only SiCl4 reacts with water.
SiCl4 is ionic and CCl4 is covalent.
4.
strongly acidic solutions, aniline becomes more reactive towards electrophilic reagents.
The amino group being completely protonated in strongly acidic solution, the lone pair of electrons of the nitrogen is no longer available for resonance.
5.
In any ionic solid (MX) with Schottky defects, the number of positive and negative ions are same.
Equal numbers of cation and anion vacancies are present.
Source JEE screening 2001
(a) If both assertion and reason are CORRECT, and reason is the CORRECT explanation of the assertion.
(b) If both assertion and reason are CORRECT, but reason is NOT the CORRECT explanation of the assertion.
(c) If assertion is CORRECT, but reason is INCORRECT.
(d) If assertion is INCORRECT, but reason is CORRECT.
1.
Dimethylsulphide is commonly used for the reduction of an ozonide of an alkene to get the carbonyl compounds.
It reduces the ozonide giving water soluble dimethyl sulphoxide and excess of it evaporates.
2.
Addition of bromine to trans-2-butene yields meso-2, 3-dibromobutane.
Bromine addition to an alkene is an electrophilic addition.
3.
Between SiCl4 and CCl4, only SiCl4 reacts with water.
SiCl4 is ionic and CCl4 is covalent.
4.
strongly acidic solutions, aniline becomes more reactive towards electrophilic reagents.
The amino group being completely protonated in strongly acidic solution, the lone pair of electrons of the nitrogen is no longer available for resonance.
5.
In any ionic solid (MX) with Schottky defects, the number of positive and negative ions are same.
Equal numbers of cation and anion vacancies are present.
Source JEE screening 2001
IIT-JEE-Chemistry-Final Revision Set No.57
1. The common features among the species CN-, CO and NO+ are :
(a) Bond order three and isoelectronic
(b) Bond order three and weak field ligands
(c) Bond order two and acceptors
(d) Isoelectronic and weak field ligands.
2. The chemical composition of ‘slag’ formed during the smelting process in the extraction of copper is :
(a) Cu2O + FeS
(b) FeSiO3
(c) CuFeS2
(d) Cu2S + FeO
3. In the standardization of Na2S2O3 using K2Cr2O7 by iodometry, the equivalent weight of K2Cr2O7 is:
(a) (molecular weight)/2
(b) (molecular weight)/6
(c) (molecular weight)/3
(d) Same as molecular weight
4. The set representing the correct order of first ionization potential is :
(a) K>Na>Li
(b) Be>Mg>Ca
(c) B>C>N
(d) Ge>Si>C
5. The correct order of hybridization of the central atom in the following species NH3, [PtCl4]2-, PCl5 and BCl3 is:
(a) dsp2,dsp3,sp2 and sp3
(b) sp3,dsp2,dsp3,sp2
(c) dsp2,sp2,sp3,dsp3
(d) dsp2,sp3,sp2,dsp3
Souce jee 2001 screening
(a) Bond order three and isoelectronic
(b) Bond order three and weak field ligands
(c) Bond order two and acceptors
(d) Isoelectronic and weak field ligands.
2. The chemical composition of ‘slag’ formed during the smelting process in the extraction of copper is :
(a) Cu2O + FeS
(b) FeSiO3
(c) CuFeS2
(d) Cu2S + FeO
3. In the standardization of Na2S2O3 using K2Cr2O7 by iodometry, the equivalent weight of K2Cr2O7 is:
(a) (molecular weight)/2
(b) (molecular weight)/6
(c) (molecular weight)/3
(d) Same as molecular weight
4. The set representing the correct order of first ionization potential is :
(a) K>Na>Li
(b) Be>Mg>Ca
(c) B>C>N
(d) Ge>Si>C
5. The correct order of hybridization of the central atom in the following species NH3, [PtCl4]2-, PCl5 and BCl3 is:
(a) dsp2,dsp3,sp2 and sp3
(b) sp3,dsp2,dsp3,sp2
(c) dsp2,sp2,sp3,dsp3
(d) dsp2,sp3,sp2,dsp3
Souce jee 2001 screening
IIT-JEE-Chemistry-Final Revision Set No.56
1. At constant temperature, the equilibrium constant (KP) for the decomposition reaction N2 O4 2NO2 is expressed by KP=4x² P/(1-x²), where P= pressure,
x = extent of decomposition. Which one of the following statements is true:
(a) KP increases with increase of P
(b) KP increases with increase of x
(c) KP increases with decrease of x
(d) KP remains constant with change in P and x
2. If 'I' is the intensity of absorbed light and ‘C’ is the concentration of AB for the photochemical process AB+hv → AB* , the rate of formation of AB* is directly proportional to :
(a) C
(b) I
(c) I2
(d) C.I
3. Saturated solution of KNO3 is used to make ‘salt-bridge’ because :
(a) Velocity of K+ is greater than that of NO3-
(b) Velocity of NO3-is greater than that of K+
(c) Velocities of both K+and NO3-are nearly the same
(d) KNO3 is highly soluble in water.
4. The reaction, 3ClO(aq)- → ClO3(aq)- + 2Cl(aq)- is an example of :
(a) Oxidation reaction
(b) Reduction reaction
(c) Disproportionate reaction
(d) Decomposition reaction
5. The number of s-s bonds in sulphur trioxide timer (S3O9) is :
(a) Three
(b) Two
(c) One
(d) Zero
source: 2001 Jee Screening
x = extent of decomposition. Which one of the following statements is true:
(a) KP increases with increase of P
(b) KP increases with increase of x
(c) KP increases with decrease of x
(d) KP remains constant with change in P and x
2. If 'I' is the intensity of absorbed light and ‘C’ is the concentration of AB for the photochemical process AB+hv → AB* , the rate of formation of AB* is directly proportional to :
(a) C
(b) I
(c) I2
(d) C.I
3. Saturated solution of KNO3 is used to make ‘salt-bridge’ because :
(a) Velocity of K+ is greater than that of NO3-
(b) Velocity of NO3-is greater than that of K+
(c) Velocities of both K+and NO3-are nearly the same
(d) KNO3 is highly soluble in water.
4. The reaction, 3ClO(aq)- → ClO3(aq)- + 2Cl(aq)- is an example of :
(a) Oxidation reaction
(b) Reduction reaction
(c) Disproportionate reaction
(d) Decomposition reaction
5. The number of s-s bonds in sulphur trioxide timer (S3O9) is :
(a) Three
(b) Two
(c) One
(d) Zero
source: 2001 Jee Screening
IIT-JEE-Chemistry-Final Revision Set No.55
1. Which one of the following statements is false :
(a) Work is state function
(b) Temperature is a state function
(c) Change in the state is completely defined when the initial and final stated are specified
(d) Work appears at the boundary of the system
2. An aqueous solution of 6.3 g oxalic acid dehydrate is made up to 250ml> the volume of 0.1N NaOH required to completely neutralize 10ml of this solution is :
(a) 40ml
(b) 20ml
(c) 10ml
(d) 4ml
3. The number of isomers for the compound with molecular formula C2BrClFI is:
(a) 3
(b) 4
(c) 5
(d) 6
4. A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH solution gives :
(a) Benzyl alcohol and sodium formate
(b) Sodium benzoate and methyl alcohol
(c) Sodium benzoate and sodium formate
(d) Benzyl alcohol and methyl alcohol
5. The correct order of equivalent conductance at infinite dilution of LiCl,NaCl and KCl is:
(a) LiCl>NaCl> KCl
(b) KCl>NaCl> LiCl
(c) NaCl>KCl>LiCl
(d) LiCl>KCl>NaCl
Source JEE 2001 screening
(a) Work is state function
(b) Temperature is a state function
(c) Change in the state is completely defined when the initial and final stated are specified
(d) Work appears at the boundary of the system
2. An aqueous solution of 6.3 g oxalic acid dehydrate is made up to 250ml> the volume of 0.1N NaOH required to completely neutralize 10ml of this solution is :
(a) 40ml
(b) 20ml
(c) 10ml
(d) 4ml
3. The number of isomers for the compound with molecular formula C2BrClFI is:
(a) 3
(b) 4
(c) 5
(d) 6
4. A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH solution gives :
(a) Benzyl alcohol and sodium formate
(b) Sodium benzoate and methyl alcohol
(c) Sodium benzoate and sodium formate
(d) Benzyl alcohol and methyl alcohol
5. The correct order of equivalent conductance at infinite dilution of LiCl,NaCl and KCl is:
(a) LiCl>NaCl> KCl
(b) KCl>NaCl> LiCl
(c) NaCl>KCl>LiCl
(d) LiCl>KCl>NaCl
Source JEE 2001 screening
IIT-JEE-Chemistry-Final Revision Set No.54
1. In thermodynamics, a process is called reversible when:
(a) Surroundings and system change into each other
(b) There is no boundary between system and surroundings
(c) The surroundings are always in equilibrium with the system
(d) The system changes into the surroundings spontaneously
2. In a solid ‘AB’ having the NaCl structure, ‘A’ atoms occupy the corners of the cubic unit cell. If all the face-centered atoms along one of the axes are removed, then the resultant stoichiometry of the solid is:
(a) AB2
(b) A2B
(c) A4B3
(d) A3B4
3. 1-Propanol and 2-Propanol can be best distinguished by :
(a) Oxidation with alkaline KMnO4 followed by reaction with Fehling solution
(b) Oxidation with acidic dichromate followed by reaction with Fehling solution
(c) Oxidation by heating with copper followed by reaction with Fehling solution
(d) Oxidation with concentrated H2SO4 followed by reaction with Fehling solution
4. An SN2 reaction at an asymmetric carbon of a compound always gives :
(a) An enantiomer of the substrate
(b) A product with opposite optical rotation
(c) A mixture of diastereomers
(d) A single steroisomer
5. The quantum numbers +1/2 and -1/2 for the electron spin represent :
(a) Rotation of the electron in clockwise and anticlockwise direction respectively
(b) Rotation of the electron in anticlockwise and clockwise direction respectively
(c) Magnetic moment of the electron pointing up and down respectively
(d) Two quantum mechanical spin states which have no classical analogue
Source JEE 2001 screening
(a) Surroundings and system change into each other
(b) There is no boundary between system and surroundings
(c) The surroundings are always in equilibrium with the system
(d) The system changes into the surroundings spontaneously
2. In a solid ‘AB’ having the NaCl structure, ‘A’ atoms occupy the corners of the cubic unit cell. If all the face-centered atoms along one of the axes are removed, then the resultant stoichiometry of the solid is:
(a) AB2
(b) A2B
(c) A4B3
(d) A3B4
3. 1-Propanol and 2-Propanol can be best distinguished by :
(a) Oxidation with alkaline KMnO4 followed by reaction with Fehling solution
(b) Oxidation with acidic dichromate followed by reaction with Fehling solution
(c) Oxidation by heating with copper followed by reaction with Fehling solution
(d) Oxidation with concentrated H2SO4 followed by reaction with Fehling solution
4. An SN2 reaction at an asymmetric carbon of a compound always gives :
(a) An enantiomer of the substrate
(b) A product with opposite optical rotation
(c) A mixture of diastereomers
(d) A single steroisomer
5. The quantum numbers +1/2 and -1/2 for the electron spin represent :
(a) Rotation of the electron in clockwise and anticlockwise direction respectively
(b) Rotation of the electron in anticlockwise and clockwise direction respectively
(c) Magnetic moment of the electron pointing up and down respectively
(d) Two quantum mechanical spin states which have no classical analogue
Source JEE 2001 screening
IIT-JEE-Chemistry-Final Revision Set No.53
1. Cyclobutyl bromide on treatment with magnesium in dry ether forms an organometallic (A). The organometallic reacts with ehtanal to give an alcohol (B) after mid acidification. Prolonged treatment of alcohol (B) with an equivalent amount of HBr gives 1-bromo-1-methylcyclopentane (C). Write the structures of (A), (B).
2. The compression factor (compressibility factor) for one mole of a Van der Waals gas at 0°C and 100 atmospheric pressure is found to be 0.5. Assuming that the volume of a gas molecule is negligible, calculate the Van der Waals constant a.
3. A white substance (A) reacts with dilute H2SO4 to produce a colourless gas (B) and a colourless solution (C). The reaction between (B) and acidified K2Cr2O7 solution produces a green solution and a slightly coloured precipitate (D). The substance (D) burns in air to produce a gas (E) which reacts with (B) to yield (D) and a colourless liquid. Anhydrous copper sulphate is turned blue on addition of this colourless liquid. Addition of aqueous NH3 or NaOH to (C) produces first a precipitate, which dissolves in the excess of the respective reagent to produce a clear solution in each case. Identify (A), (B), (C), (D) and (E).
4. The vapour pressure of two miscible liquids (A) and (B) are 3000 and 5000 mm of Hg respectively. In a flask 10 moles of (A) is mixed with 12 moles of (B). However, as soon as (B) is added, (A) starts polymerizing into a completely insoluble solid. The polymerization follows first-order kinetics. After 100 minutes, 0.525 mole of a solute is dissolved which arrests the polymerization completely. The final vapour pressure of the solution is 400 mm of Hg. Estimate the rate constant of the polymerization reaction. Assume negligible volume change on mixing and polymerization and ideal behavior for the final solution.
5. The standard potential of the following cell is 0.23 V at 15oC and 0.21 V at 35°C.
Pt | H2(g) | HCl(aq) || AgCl(s) | Ag(s)
Write the cell reaction.
Source 2001 JEE
2. The compression factor (compressibility factor) for one mole of a Van der Waals gas at 0°C and 100 atmospheric pressure is found to be 0.5. Assuming that the volume of a gas molecule is negligible, calculate the Van der Waals constant a.
3. A white substance (A) reacts with dilute H2SO4 to produce a colourless gas (B) and a colourless solution (C). The reaction between (B) and acidified K2Cr2O7 solution produces a green solution and a slightly coloured precipitate (D). The substance (D) burns in air to produce a gas (E) which reacts with (B) to yield (D) and a colourless liquid. Anhydrous copper sulphate is turned blue on addition of this colourless liquid. Addition of aqueous NH3 or NaOH to (C) produces first a precipitate, which dissolves in the excess of the respective reagent to produce a clear solution in each case. Identify (A), (B), (C), (D) and (E).
4. The vapour pressure of two miscible liquids (A) and (B) are 3000 and 5000 mm of Hg respectively. In a flask 10 moles of (A) is mixed with 12 moles of (B). However, as soon as (B) is added, (A) starts polymerizing into a completely insoluble solid. The polymerization follows first-order kinetics. After 100 minutes, 0.525 mole of a solute is dissolved which arrests the polymerization completely. The final vapour pressure of the solution is 400 mm of Hg. Estimate the rate constant of the polymerization reaction. Assume negligible volume change on mixing and polymerization and ideal behavior for the final solution.
5. The standard potential of the following cell is 0.23 V at 15oC and 0.21 V at 35°C.
Pt | H2(g) | HCl(aq) || AgCl(s) | Ag(s)
Write the cell reaction.
Source 2001 JEE
IIT JEE Chemistry Final Revision Set No.53
1. Compound (X) on reduction with LiAIH4 gives a hydride (Y) containing 21.72 hydrogen along with other products. The compounds (Y) reacts with air explosively resulting in boron trioxide. Identify (X) and (Y).
2. A metal complex having compositon Cr (NH3)4 CI2Br has been isolated in two forms (A) and (B). The form (A) reacts with AgNO3 to give a white precipitate readily soluble in dilute aqueous ammonia, whereas (B) givens a pale yellow precipitate soluble in concentrated ammonia. Write the formula of (A) and (B).
3.Starting from SiCI4, how do you prepare silicon?
4. Hydrogen peroxide solution (20 ml) reacts quantitatively with a solution of KMnO4 (20 ml) acidified with dilute H2SO4. The same volume of the KMnO4 solution is just decolourised by 10 mL of MnSO4 in neutral medium simultaneously forming a dark brown precipitate of hydrated MnO2. The brown precipitate is dissolved in 10 ml of 0.2 M sodium oxalate under boiling condition in the presence of dilute H2SO4. Write the balanced equations involved in the reactions.
5. How would you synthesise 4-methoxyphenol from bromobenzene in NOT more than five steps?
Source: JEE 2001 mains
2. A metal complex having compositon Cr (NH3)4 CI2Br has been isolated in two forms (A) and (B). The form (A) reacts with AgNO3 to give a white precipitate readily soluble in dilute aqueous ammonia, whereas (B) givens a pale yellow precipitate soluble in concentrated ammonia. Write the formula of (A) and (B).
3.Starting from SiCI4, how do you prepare silicon?
4. Hydrogen peroxide solution (20 ml) reacts quantitatively with a solution of KMnO4 (20 ml) acidified with dilute H2SO4. The same volume of the KMnO4 solution is just decolourised by 10 mL of MnSO4 in neutral medium simultaneously forming a dark brown precipitate of hydrated MnO2. The brown precipitate is dissolved in 10 ml of 0.2 M sodium oxalate under boiling condition in the presence of dilute H2SO4. Write the balanced equations involved in the reactions.
5. How would you synthesise 4-methoxyphenol from bromobenzene in NOT more than five steps?
Source: JEE 2001 mains
IIT-JEE-Chemistry-Final Revision Set No.52
All questions Assertion - Reason type.
State whether the first statement is right or wrong and whether the second statement is right explanation for the first statement in case the first statement is right.
1.
S1-Butene on reaction with HBr in the presence of a peroxide produces 1-bromobutane.
S2. It involves the formation of primary radical.
2.
S1. The first ionization energy of Be is greater than that of B.
S2. 2p orbital is lower in energy than 2s.
3.
S1. The pressure of a fixed amount of an ideal gas is proportional to its temperature
S2. Frequency of collisions and their impact both increase in proportion to the square root of temperature.
4.
Phenol is more reactive than benzene towards electrophilic substitution reaction.
S2. In the case of phenol, the intermediate carbocation is more resonance stabilized.
5.
S1. The heat absorbed during the isothermal expansion of an ideal gas against vacuum is zero.
S2. The volume occupied by the molecules of an ideal gas is zero.
Source: JEE 2000
State whether the first statement is right or wrong and whether the second statement is right explanation for the first statement in case the first statement is right.
1.
S1-Butene on reaction with HBr in the presence of a peroxide produces 1-bromobutane.
S2. It involves the formation of primary radical.
2.
S1. The first ionization energy of Be is greater than that of B.
S2. 2p orbital is lower in energy than 2s.
3.
S1. The pressure of a fixed amount of an ideal gas is proportional to its temperature
S2. Frequency of collisions and their impact both increase in proportion to the square root of temperature.
4.
Phenol is more reactive than benzene towards electrophilic substitution reaction.
S2. In the case of phenol, the intermediate carbocation is more resonance stabilized.
5.
S1. The heat absorbed during the isothermal expansion of an ideal gas against vacuum is zero.
S2. The volume occupied by the molecules of an ideal gas is zero.
Source: JEE 2000
IIT-JEE-Chemistry-Final Revision Set No.51
1. Which of the following compounds will exhibit geometrical isomerism:
(A) 1-phenyl-2-butene (B) 3-phenyl-1-butene
(C) 2-phenyl-1-butene (D) 1, 1-diphenyl-1-propene
2. Among the following, the strongest base is:
(A) C6H5NH2 (B) p – NO2C6H4NH2
(C) m – NO2 – C6H4NH2 (D) C6H5CH2NH2
3. The correct order of radii is:
(A) N < Be < B (B) F– < O2– < N3–
(C) Na < Li < K (D) Fe3+ < Fe2+ < Fe4+
4. Propyne and propene can be distinguished by:
(A) conc. H2SO4 (B) Br2 in CCI4
(C) dil. KMnO4 (D) AgNO3 in ammonia
5. The compressibility of a gas is less than unity at STP. Therefore :
(A) Vm > 22.4 litres (B) Vm < 22.4 litres
(C) Vm = 22.4 litres (D) Vm = 44.8 litres
Source JEE 2000
(A) 1-phenyl-2-butene (B) 3-phenyl-1-butene
(C) 2-phenyl-1-butene (D) 1, 1-diphenyl-1-propene
2. Among the following, the strongest base is:
(A) C6H5NH2 (B) p – NO2C6H4NH2
(C) m – NO2 – C6H4NH2 (D) C6H5CH2NH2
3. The correct order of radii is:
(A) N < Be < B (B) F– < O2– < N3–
(C) Na < Li < K (D) Fe3+ < Fe2+ < Fe4+
4. Propyne and propene can be distinguished by:
(A) conc. H2SO4 (B) Br2 in CCI4
(C) dil. KMnO4 (D) AgNO3 in ammonia
5. The compressibility of a gas is less than unity at STP. Therefore :
(A) Vm > 22.4 litres (B) Vm < 22.4 litres
(C) Vm = 22.4 litres (D) Vm = 44.8 litres
Source JEE 2000
Friday, October 9, 2009
IIT-JEE-Chemistry-Final Revision Set No.50
1. Which of the following, has the most acidic hydrogen:
(A) 3–hexanone (B) 2, 4-hexanedione
(C) 2, 5-hexanedione (D) 2, 3-hexanedione
2. Benzoyl chloride is prepared from benzoic acid by:
(A) Cl2, hv (B) SO2Cl2
(C) SOCl2 (D) Cl2, H2O
3. Electrolytic reduction of alumina to aluminium by Hall-Heroult process is carried out:
(A) in the presence of NaCl.
(B) in the presence of fluorite.
(C) in the presence of cryolite which forms a melt with lower melting temperature.
(D) in the presence of cryolite which forms a melt with higher melting temperature.
4. The hybridization of atomic orbitals of nitrogen in NO2+, NO3- and NH4+ are:
(A) sp, sp3 and sp2 respectively (B) sp, sp2 and sp3 respectively
(C) sp2, sp and sp3 respectively (D) sp2, sp3 and sp respectively
5. Amongst H2O, H2S, H2Se and H2Te, the one with the highest boiling point is:
(A) H2O because of hydrogen bonding
(B) H2Te because of higher molecular weight
(C) H2S because of hydrogen bonding
(D) H2Se because of lower molecular weight
JEE 2000
(A) 3–hexanone (B) 2, 4-hexanedione
(C) 2, 5-hexanedione (D) 2, 3-hexanedione
2. Benzoyl chloride is prepared from benzoic acid by:
(A) Cl2, hv (B) SO2Cl2
(C) SOCl2 (D) Cl2, H2O
3. Electrolytic reduction of alumina to aluminium by Hall-Heroult process is carried out:
(A) in the presence of NaCl.
(B) in the presence of fluorite.
(C) in the presence of cryolite which forms a melt with lower melting temperature.
(D) in the presence of cryolite which forms a melt with higher melting temperature.
4. The hybridization of atomic orbitals of nitrogen in NO2+, NO3- and NH4+ are:
(A) sp, sp3 and sp2 respectively (B) sp, sp2 and sp3 respectively
(C) sp2, sp and sp3 respectively (D) sp2, sp3 and sp respectively
5. Amongst H2O, H2S, H2Se and H2Te, the one with the highest boiling point is:
(A) H2O because of hydrogen bonding
(B) H2Te because of higher molecular weight
(C) H2S because of hydrogen bonding
(D) H2Se because of lower molecular weight
JEE 2000
IIT-JEE-Chemistry-Final Revision Set No.49
1. Ammonia can be dried by
a. conc H2SO4 b. P4O10
c. CaO d. anhydrous CaCl2
2. The chemical process in the production of steel from haematite or involves:
a. reduction b. oxidation
c. reduction followed by oxidation d. oxidation followed by reduction
3. The number of P-O-P bonds in cyclic metaphosphoric acid is:
a. zero b. two c. three d. four
4. When two reactants, A and B are mixed to give products C and D, the reaction quotient, Q, at the initial stages of the reaction
a. is zero. b. decreases with time
c. is independent of time d. increases with time
5. The number of nodal planes in a px orbital is
a. one b. two c. three d. zero
Source: JEE 2000
a. conc H2SO4 b. P4O10
c. CaO d. anhydrous CaCl2
2. The chemical process in the production of steel from haematite or involves:
a. reduction b. oxidation
c. reduction followed by oxidation d. oxidation followed by reduction
3. The number of P-O-P bonds in cyclic metaphosphoric acid is:
a. zero b. two c. three d. four
4. When two reactants, A and B are mixed to give products C and D, the reaction quotient, Q, at the initial stages of the reaction
a. is zero. b. decreases with time
c. is independent of time d. increases with time
5. The number of nodal planes in a px orbital is
a. one b. two c. three d. zero
Source: JEE 2000
IIT-JEE-Chemistry-Final Revision Set No.49
1. A cell, Ag | Ag+ || Cu2+ | Cu, initially contains 1 M Ag+ and 1 M Cu2+ ions. Calculate the change in the cell potential after the passage of 9.65 A of current for 1 h.
2. The solubility of Pb(OH)2 in water is 6.7 × 10-6 M. Calculate the solubility of Pb(OH)2 in a buffer solution of pH = 8.
3. Estimate the average S–F bond energy in SF6. The values F standard enthalpy of formation of SF6(g), S(g) and F(g) are : 1100, 275 and 80 kJ mol–1 respectively.
4. The rate constant for an isomerisation reaction, A --> B is 4.5 × 10-3 min. If the initial concentration of A is 1 M, calculate the rate of the reaction after 1 h.
5. A metal crystallizes into two cubic phases, face centered cubic (FCC) and body centered cubic (BCC), whose unit cell lengths are 3.5 and 3.0 A, respectively. Calculate the ratio of densities of FCC and BCC.
Source 1999 JEE
2. The solubility of Pb(OH)2 in water is 6.7 × 10-6 M. Calculate the solubility of Pb(OH)2 in a buffer solution of pH = 8.
3. Estimate the average S–F bond energy in SF6. The values F standard enthalpy of formation of SF6(g), S(g) and F(g) are : 1100, 275 and 80 kJ mol–1 respectively.
4. The rate constant for an isomerisation reaction, A --> B is 4.5 × 10-3 min. If the initial concentration of A is 1 M, calculate the rate of the reaction after 1 h.
5. A metal crystallizes into two cubic phases, face centered cubic (FCC) and body centered cubic (BCC), whose unit cell lengths are 3.5 and 3.0 A, respectively. Calculate the ratio of densities of FCC and BCC.
Source 1999 JEE
IIT-JEE-Chemistry-Final Revision Set No.48
1. In the Contact process for industrial manufacture of sulphuric acid, some amount of sulphuric acid is used as a starting material. Explain briefly. What is the catalyst used in the oxidation of SO2?
2. Explain why o-hydroxybenzaldehyde is a liquid at room temperature while
p-hydroxybenzaldehyde is a high melting solid.
3. A plant virus is found to consist of uniform cylindrical particles of 150 A in diameter and 5000 A long. The specific volume of the virus is 0.75 cm3/g.
If the virus is considered to be a single particle, find its molar mass.
4. When 3.06 g of solid NH4HS is introduced into a two-litre evacuated flask at 27°C, 30% of the solid decomposes into gaseous ammonia and hydrogen sulphide.
(i) Calculate Kc and Kp for the reaction at 27°C.
5. One mole of nitrogen gas at 0.8 atm takes 38 s to diffuse through a pinhole, whereas one mole of an unknown compound of xenon with fluorine at 1.6 atm takes 57s to diffuse through the same hole. Calculate the molecular formula of the compound.
Source 1999 JEE
2. Explain why o-hydroxybenzaldehyde is a liquid at room temperature while
p-hydroxybenzaldehyde is a high melting solid.
3. A plant virus is found to consist of uniform cylindrical particles of 150 A in diameter and 5000 A long. The specific volume of the virus is 0.75 cm3/g.
If the virus is considered to be a single particle, find its molar mass.
4. When 3.06 g of solid NH4HS is introduced into a two-litre evacuated flask at 27°C, 30% of the solid decomposes into gaseous ammonia and hydrogen sulphide.
(i) Calculate Kc and Kp for the reaction at 27°C.
5. One mole of nitrogen gas at 0.8 atm takes 38 s to diffuse through a pinhole, whereas one mole of an unknown compound of xenon with fluorine at 1.6 atm takes 57s to diffuse through the same hole. Calculate the molecular formula of the compound.
Source 1999 JEE
IIT-JEE-Chemistry-Final Revision Set No.47
1. A positive carbylamines test is given by :
(A) N, N–dimethylaniline (B) 2, 4–dimethylaniline
(C) N-methyl-o-methylaniline (D) p-methylbenzylamine
2. The optically active tartaric acid is named as D – (+) – tartaric acid because it has a positive :
(A) optical rotation and is derived from D-glucose
(B) pH in organic solvent
(C) optical rotation and is derived from D – (+) – glyceraldehyde
(D) optical rotation only when substituted by deuterium
3. A solution of (+) –2–chloro–2–phenylethane in toluene racemises slowly in the presence of small amount of SbCl5, due to the formation of:
(A) free-radical (B) carbine
(C) carbanion (D) carbocation
4. How many millilitres of 0.5 M H2SO4 are needed to dissolve 0.5 g of copper (II) carbonate?
5. Give reasons for the following in one or two sentences only.
(i) BeCI2 can be easily hydrolysed.
(ii) CrO3 is an acid anhydride.
Source 1999 JEE
(A) N, N–dimethylaniline (B) 2, 4–dimethylaniline
(C) N-methyl-o-methylaniline (D) p-methylbenzylamine
2. The optically active tartaric acid is named as D – (+) – tartaric acid because it has a positive :
(A) optical rotation and is derived from D-glucose
(B) pH in organic solvent
(C) optical rotation and is derived from D – (+) – glyceraldehyde
(D) optical rotation only when substituted by deuterium
3. A solution of (+) –2–chloro–2–phenylethane in toluene racemises slowly in the presence of small amount of SbCl5, due to the formation of:
(A) free-radical (B) carbine
(C) carbanion (D) carbocation
4. How many millilitres of 0.5 M H2SO4 are needed to dissolve 0.5 g of copper (II) carbonate?
5. Give reasons for the following in one or two sentences only.
(i) BeCI2 can be easily hydrolysed.
(ii) CrO3 is an acid anhydride.
Source 1999 JEE
IIT JEE Chemistry Final Revision Set No.46
1. The geometry of Ni(CO)4
(A) square planar
(B) tetrahedral
2. The geometry of Ni(PPh3)2Cl2 is:
(A) square planar
(B) tetrahedral
3. In compounds of type ECl3, where E = B, P, As or Bi, the angles Cl–E–Cl
(A) B > P = As = Bi
(B) B > P > As > Bi
(C) B < P = As = Bi
(D) B < P < As < Bi
4. In the compound CH2 = CH—CH2—CH2—C≡CH, the C2 = C3 bonds is of
(A) sp – sp2 (B) sp3 – sp3
(C) sp – sp3 (D) sp2 – sp3
5. When propionic acid is treated with aqueous sodium bicarbonate, CO2 is liberated the ‘C’ of CO2 comes from :
(A) methyl group (B) carboxylic acid group
(C) methylene group (D) bicarbonate
Source: JEE 1999
(A) square planar
(B) tetrahedral
2. The geometry of Ni(PPh3)2Cl2 is:
(A) square planar
(B) tetrahedral
3. In compounds of type ECl3, where E = B, P, As or Bi, the angles Cl–E–Cl
(A) B > P = As = Bi
(B) B > P > As > Bi
(C) B < P = As = Bi
(D) B < P < As < Bi
4. In the compound CH2 = CH—CH2—CH2—C≡CH, the C2 = C3 bonds is of
(A) sp – sp2 (B) sp3 – sp3
(C) sp – sp3 (D) sp2 – sp3
5. When propionic acid is treated with aqueous sodium bicarbonate, CO2 is liberated the ‘C’ of CO2 comes from :
(A) methyl group (B) carboxylic acid group
(C) methylene group (D) bicarbonate
Source: JEE 1999
Thursday, October 8, 2009
IIT-JEE-Chemistry-Final Revision Set No.45
1. In the dichromate dianion :
(A) 4 Cr—O bonds are equivalent
(B) 6 Cr—O bonds are equivalent
(C) all Cr—O bonds are equivalent
(D) all Cr—O bonds are nonequivalent
2. The oxidation number of sulphur in S8, S2F2, H2S respectively, are :
(A) 0, +1 and –2 (B) +2, +1 and –2
(C) 0, +1 and +2 (D) –2, +1 and –2
3. In the commercial electrochemical process for aluminium extraction, the electrolyte used is :
(A) Al(OH)3 in NaOH solution
(B) an aqueous solution of Al2(SO4)3
(C) a molten mixture of Al2O3 and Na3AlF6
(D) a molten mixture of AlO(OH) and Al(OH)3
4. On heating ammonium dichromate, the gas evolved is:
(A) oxygen (B) ammonia
(C) nitrous oxide (D) nitrogen
5. The geometry of H2S and its dipole moment are :
(A) angular and non-zero (B) angular and zero
(C) linear and non-zero (D) linear and zero
Source: 1999 JEE
Hints
3. Visit http://iit-jee-chemistry.blogspot.com/2008/02/revision-electrolytic-reduction-method.html
(A) 4 Cr—O bonds are equivalent
(B) 6 Cr—O bonds are equivalent
(C) all Cr—O bonds are equivalent
(D) all Cr—O bonds are nonequivalent
2. The oxidation number of sulphur in S8, S2F2, H2S respectively, are :
(A) 0, +1 and –2 (B) +2, +1 and –2
(C) 0, +1 and +2 (D) –2, +1 and –2
3. In the commercial electrochemical process for aluminium extraction, the electrolyte used is :
(A) Al(OH)3 in NaOH solution
(B) an aqueous solution of Al2(SO4)3
(C) a molten mixture of Al2O3 and Na3AlF6
(D) a molten mixture of AlO(OH) and Al(OH)3
4. On heating ammonium dichromate, the gas evolved is:
(A) oxygen (B) ammonia
(C) nitrous oxide (D) nitrogen
5. The geometry of H2S and its dipole moment are :
(A) angular and non-zero (B) angular and zero
(C) linear and non-zero (D) linear and zero
Source: 1999 JEE
Hints
3. Visit http://iit-jee-chemistry.blogspot.com/2008/02/revision-electrolytic-reduction-method.html
IIT-JEE-Chemistry-Final Revision Set No.44
1. A gas will approach ideal behaviour at :
(A) low temperature and low pressure
(B) low temperature and high pressure
(C) high temperature and low pressure
(D) high temperature and high pressure
2. A gas X at 1 atm is bubbled through a solution containing a mixture of 1 M Y– and 1 M Z– at 25 degrees C. If the reduction potential of Z < Y > X, then :
(A) Y will oxidize X and not Z
(B) Y will oxidize Z and not X
(C) Y will oxidize both X and Z
(D) Y will reduce both X and Z
3. The pH of 0.1 M solution of the following salts increases in the order :
(A) NaCl < NH3Cl < NaCN < HCl
(B) HCl < NH4Cl < NaCl< NaCN
(C) NaCN < NH4Cl < NaCl < HCl
(D) HCl < NaCl < NaCN < NH4Cl
4. For the chemical reaction 3X(g) + Y(g) <--> X3Y(g), the amount of X3Y at equilibrium is affected by :
(A) temperature and pressure
(B) temperature only
(C) pressure only
(D) temperature, pressure and catalyst
5. One mole of calcium phosphide on reaction with excess water gives :
(A) one mole of phosphine
(B) two moles of phosphoric acid
(C) two moles of phosphine
(D) one mole of phosphorus pentoxide
Source: 1999 JEE
(A) low temperature and low pressure
(B) low temperature and high pressure
(C) high temperature and low pressure
(D) high temperature and high pressure
2. A gas X at 1 atm is bubbled through a solution containing a mixture of 1 M Y– and 1 M Z– at 25 degrees C. If the reduction potential of Z < Y > X, then :
(A) Y will oxidize X and not Z
(B) Y will oxidize Z and not X
(C) Y will oxidize both X and Z
(D) Y will reduce both X and Z
3. The pH of 0.1 M solution of the following salts increases in the order :
(A) NaCl < NH3Cl < NaCN < HCl
(B) HCl < NH4Cl < NaCl< NaCN
(C) NaCN < NH4Cl < NaCl < HCl
(D) HCl < NaCl < NaCN < NH4Cl
4. For the chemical reaction 3X(g) + Y(g) <--> X3Y(g), the amount of X3Y at equilibrium is affected by :
(A) temperature and pressure
(B) temperature only
(C) pressure only
(D) temperature, pressure and catalyst
5. One mole of calcium phosphide on reaction with excess water gives :
(A) one mole of phosphine
(B) two moles of phosphoric acid
(C) two moles of phosphine
(D) one mole of phosphorus pentoxide
Source: 1999 JEE
IIT-JEE-Chemistry-Final Revision Set No.43
1,. The number of neutrons accompanying the formation of 139Xe54 and 94Sr38 from the absorption of a slow neutron by 235U92, followed by nuclear fission is :
(A) 0 (B) 2
(C) 1 (D) 3
2. The correct order of increasing C–O bond length of CO, CO2-3, CO2 is :
(A) CO2-3 < CO2 < CO (B) CO2 < CO2-3 < CO
(C) CO < CO2-3 < CO2 (D) CO < CO2 < CO2-3
3. The electrons, identified by quantum numbers n and l, (i) n = 4, l = 1, (ii) n = 4, l = 0, (iii) n = 3, l = 2, and (iv) n = 3, l = 1 can be placed in order of increasing energy, from the lowest to highest, as:
(A) (iv) < (ii) < (iii) < (i) (B) (ii) < (iv) < (i) < (iii)
(C) (i) < (iii) < (ii) < (iv) (D) (iii) < (i) < (iv) < (ii)
4. The coordination number of a metal crystallizing in a hexagonal close-packed structure is :
a. 12 b. 4 c. 8 d. 6
5. The normality of 0.3 M phosphorus acid (H3PO3) is
(a) 0.1 (b) 0.9
(c) 0.3 (d) 0.6
Source: 1999 JEE
(A) 0 (B) 2
(C) 1 (D) 3
2. The correct order of increasing C–O bond length of CO, CO2-3, CO2 is :
(A) CO2-3 < CO2 < CO (B) CO2 < CO2-3 < CO
(C) CO < CO2-3 < CO2 (D) CO < CO2 < CO2-3
3. The electrons, identified by quantum numbers n and l, (i) n = 4, l = 1, (ii) n = 4, l = 0, (iii) n = 3, l = 2, and (iv) n = 3, l = 1 can be placed in order of increasing energy, from the lowest to highest, as:
(A) (iv) < (ii) < (iii) < (i) (B) (ii) < (iv) < (i) < (iii)
(C) (i) < (iii) < (ii) < (iv) (D) (iii) < (i) < (iv) < (ii)
4. The coordination number of a metal crystallizing in a hexagonal close-packed structure is :
a. 12 b. 4 c. 8 d. 6
5. The normality of 0.3 M phosphorus acid (H3PO3) is
(a) 0.1 (b) 0.9
(c) 0.3 (d) 0.6
Source: 1999 JEE
IIT-JEE-Chemistry-Final Revision sset No.42
Multiple correct choice may exist
1. An aromatic molecule will :
(A) have 4nπ electrons (B) have (4n + 2)π electrons
(C) be planar (D) be cyclic
2. A buffer solution can be prepared from a mixture of :
(A) sodium acetate and acetic acid in water
(B) sodium acetate and hydrochloric acid in water
(C) ammonia and ammonium chloride in water
(D) ammonia and sodium hydroxide in water
3. Ammonia, on reaction with hypochlorite anion, can form:
(A) NO (B) NH4Cl
(C) N2H4 (D) HNO2
4. Ionic radii of :
(A) Ti4+ < Mn7+ (B) 35Cl- is less than37Cl-
(C) K+ > CI- (D) P3+ > P5+
5. A white solid is either Na2O or Na2O2. A piece of red litmus paper turns white when it is dipped into a freshly made aqueous solution of the white solid.
Identify the substance
1. An aromatic molecule will :
(A) have 4nπ electrons (B) have (4n + 2)π electrons
(C) be planar (D) be cyclic
2. A buffer solution can be prepared from a mixture of :
(A) sodium acetate and acetic acid in water
(B) sodium acetate and hydrochloric acid in water
(C) ammonia and ammonium chloride in water
(D) ammonia and sodium hydroxide in water
3. Ammonia, on reaction with hypochlorite anion, can form:
(A) NO (B) NH4Cl
(C) N2H4 (D) HNO2
4. Ionic radii of :
(A) Ti4+ < Mn7+ (B) 35Cl- is less than37Cl-
(C) K+ > CI- (D) P3+ > P5+
5. A white solid is either Na2O or Na2O2. A piece of red litmus paper turns white when it is dipped into a freshly made aqueous solution of the white solid.
Identify the substance
IIT-JEE-Chemistry-Final Revision sset No.41
Multiple correct choices are possible
1.The following is(are) endothermic reaction(s) :
(a) Combustion of methane
(b) Decomposition of water
(c) Dehydrogenation of ethane of ethylene
(d) Conversion of graphite to diamond.
2. Toluene, when treated with Br2/Fe, gives p-bromotoulene as the major product because the CH3 group :
(A) is para directing
(B) is meta directing
(C) actives the ring by hyperconjugation
(D) deactivates the ring
3. The following statement(s) is(are) correct :
(A) A plot of log Kp versus 1/T is linear
(B) A plot of log [X] versus time is linear for a first order reaction, X --> P
(C) A plot of log p versus 1/T is linear at constant volume
(D) A plot of p versus 1/V is linear at constant temperature
4. The following is(are) endothermic reaction(s) :
(A) Combustion of methane
(B) Decomposition of water
(C) Dehydrogenation of ethane of ethylene
(D) Conversion of graphite to diamond.
5. In the depression of freezing point experiment, it is found that the:
(A) vapour pressure of the solution is less than that of pure solvent
(B) vapour pressure of the solution is more than that of pure solvent
(C) only solute molecules solidify at the freezing point
(D) only solvent molecules solidify at the freezing point
Source
JEE chemistry 1999
1.The following is(are) endothermic reaction(s) :
(a) Combustion of methane
(b) Decomposition of water
(c) Dehydrogenation of ethane of ethylene
(d) Conversion of graphite to diamond.
2. Toluene, when treated with Br2/Fe, gives p-bromotoulene as the major product because the CH3 group :
(A) is para directing
(B) is meta directing
(C) actives the ring by hyperconjugation
(D) deactivates the ring
3. The following statement(s) is(are) correct :
(A) A plot of log Kp versus 1/T is linear
(B) A plot of log [X] versus time is linear for a first order reaction, X --> P
(C) A plot of log p versus 1/T is linear at constant volume
(D) A plot of p versus 1/V is linear at constant temperature
4. The following is(are) endothermic reaction(s) :
(A) Combustion of methane
(B) Decomposition of water
(C) Dehydrogenation of ethane of ethylene
(D) Conversion of graphite to diamond.
5. In the depression of freezing point experiment, it is found that the:
(A) vapour pressure of the solution is less than that of pure solvent
(B) vapour pressure of the solution is more than that of pure solvent
(C) only solute molecules solidify at the freezing point
(D) only solvent molecules solidify at the freezing point
Source
JEE chemistry 1999
Wednesday, October 7, 2009
IIT JEE Chemistry Final Revision Sets No.40
1. Assertion-Reason type
Addition of Br2 to 1–butene gives two optical isomers.
The product contains one asymmetric carbon.
2. Assertion reason type
LiCl is predominantly a covalent compound.
Electronegativity difference between Li and Cl is too small.
3. Assertion reason type
HNO3 is a stronger acid than HNO2.
In HNO3 there are two nitrogen-to-oxygen bonds whereas in HNO2 there is only one.
4. What will be the resultant pH when 200 mL of an aqueous solution of HCI (pH = 2.0) is mixed with 300 mL of an aqueous solution of NaOH (pH = 12.0)?
5. A evacuated glass vessel weighs 50.0 g when empt, 148.0 g when filled with a liquid of density 0.98 mL-1 and 50.5 g when filled with an ideal gas at 760 mm Hg at 300 K. Determine the molar mass of the gas.
Source JEE 1998
Addition of Br2 to 1–butene gives two optical isomers.
The product contains one asymmetric carbon.
2. Assertion reason type
LiCl is predominantly a covalent compound.
Electronegativity difference between Li and Cl is too small.
3. Assertion reason type
HNO3 is a stronger acid than HNO2.
In HNO3 there are two nitrogen-to-oxygen bonds whereas in HNO2 there is only one.
4. What will be the resultant pH when 200 mL of an aqueous solution of HCI (pH = 2.0) is mixed with 300 mL of an aqueous solution of NaOH (pH = 12.0)?
5. A evacuated glass vessel weighs 50.0 g when empt, 148.0 g when filled with a liquid of density 0.98 mL-1 and 50.5 g when filled with an ideal gas at 760 mm Hg at 300 K. Determine the molar mass of the gas.
Source JEE 1998
IIT JEE Chemistry Final Revision Sets No.39
1. Hydrogen peroxide acts both as an oxidizing and as a reducting agent in alkaline solution towards certain first row transition metal ions. Give examples
2. Give reason: Acid catalysed dehydration of t-butanol is faster than that of n-butanol.
3. Assertion - Reason type
Nuclide 30Ai13 is less stable than 40Ca20.
Nuclides having odd number of protons and neutrons are general unstable.
4. Assertion - Reason type
Al (OH)3 is amphoteric in nature
Al — O and O — H bonds can be broken with equal ease in Al(OH)3
5. Assertion - Reason type
statement:The value of Van der Waals’ constant ‘a’ is larger for ammonia than for nitrogen.
Reason: Hydrogen bonding is present in ammonia.
Source: 1998 JEE
2. Give reason: Acid catalysed dehydration of t-butanol is faster than that of n-butanol.
3. Assertion - Reason type
Nuclide 30Ai13 is less stable than 40Ca20.
Nuclides having odd number of protons and neutrons are general unstable.
4. Assertion - Reason type
Al (OH)3 is amphoteric in nature
Al — O and O — H bonds can be broken with equal ease in Al(OH)3
5. Assertion - Reason type
statement:The value of Van der Waals’ constant ‘a’ is larger for ammonia than for nitrogen.
Reason: Hydrogen bonding is present in ammonia.
Source: 1998 JEE
IIT JEE Chemistry Final Revision Sets No.38
1. Anyhydrous ferric chloride can be prepared from its hexahydrated salt by treating with 2, 2-dimethoxypropane.
Give the balanced equation.
2. State true or false
The conjugate base of H2PO4- is HPO42-
3. Assertion-Reason type
Statement: F atom has a less negative electron affinity than CI atom.
Reason: Additional electrons are repelled more effectively by 3p electrons in CI atom than by 2p electrons in F atom.
4. Reaction of phosphoric acid with Ca5(PO4) F yields a fertilizer “triple superphospate” Represent the same through balanced chemical equation.
5. An aqueous solution containing 0.10g KIO3 (formula weight = 214.0) was treated with an excess of KI solution. The solution was acidified with HCI. The liberated I2 consumed 45.0 mL of thiosulphate solution decolourise the blue starch-iodine complex. Calculate the molarity of the sodium thiosulphate solution.
Source: 1998 JEE
Give the balanced equation.
2. State true or false
The conjugate base of H2PO4- is HPO42-
3. Assertion-Reason type
Statement: F atom has a less negative electron affinity than CI atom.
Reason: Additional electrons are repelled more effectively by 3p electrons in CI atom than by 2p electrons in F atom.
4. Reaction of phosphoric acid with Ca5(PO4) F yields a fertilizer “triple superphospate” Represent the same through balanced chemical equation.
5. An aqueous solution containing 0.10g KIO3 (formula weight = 214.0) was treated with an excess of KI solution. The solution was acidified with HCI. The liberated I2 consumed 45.0 mL of thiosulphate solution decolourise the blue starch-iodine complex. Calculate the molarity of the sodium thiosulphate solution.
Source: 1998 JEE
IIT JEE Chemistry Final Revision Sets No.37
1. For a first order reaction :
(A) the degree of dissociation is equal to (1 – e-kt).
(B) a plot of reciprocal concentration of the reactant vs. time gives a straight line.
(C) the time taken for the completion of 75% reaction is thrice the time taken for completion of 50% of the reaction.
(D) the pre-exponential factor in the Arrhenius equation has the dimension of time, T-1.
2. According to Graham’s law, at a given temperature the ratio of the rates of diffusion rA/rB of gases A and B is given by:
(A) (PA / PB) (MA / MB)1/2 (B) (MA / MB) (PA / PB)1/2
(C) (PA/ PB ) (MB / MA)1/2 (D) (MA / MB) (PB/ PA)1/2
3. State true or false
The pH of 1.0 × 10-8 M solution of HCI is 8.
4. Assertion -Reason
Statement: Benzonitrile is prepared by the reaction of chlorobenzene with potassium cyanide.
Reason: Cyanide (CN–) is a strong nucleophile.
5. Thionyl chloride can be synthesized by chlorinating SO2 using PCI5.
Give its balanced equation.
Source: 1998 JEE
(A) the degree of dissociation is equal to (1 – e-kt).
(B) a plot of reciprocal concentration of the reactant vs. time gives a straight line.
(C) the time taken for the completion of 75% reaction is thrice the time taken for completion of 50% of the reaction.
(D) the pre-exponential factor in the Arrhenius equation has the dimension of time, T-1.
2. According to Graham’s law, at a given temperature the ratio of the rates of diffusion rA/rB of gases A and B is given by:
(A) (PA / PB) (MA / MB)1/2 (B) (MA / MB) (PA / PB)1/2
(C) (PA/ PB ) (MB / MA)1/2 (D) (MA / MB) (PB/ PA)1/2
3. State true or false
The pH of 1.0 × 10-8 M solution of HCI is 8.
4. Assertion -Reason
Statement: Benzonitrile is prepared by the reaction of chlorobenzene with potassium cyanide.
Reason: Cyanide (CN–) is a strong nucleophile.
5. Thionyl chloride can be synthesized by chlorinating SO2 using PCI5.
Give its balanced equation.
Source: 1998 JEE
IIT JEE Chemistry Final Revision Sets No.36
1. State true or false
The oxidation state of nitrogen in HN3 is –3.
2. Which of the following will undergo aldol condensation :
(A) acetaldehyde (B) propanaldehyde
(C) benzaldehyde (D) trideuteroactaldehyde
3. Decrease in atomic number is observed during :
(A) alpha emission (B) beta emission
(C) positron emission (D) electron capture.
4. Benzenediazonium chloride on reaction with phenol in weakly basic medium gives :
(A) diphenyl ether (B) p-hydroxyazobenzene
(C) chlorobenzene (D) benzene
5. Among the following compounds, the strongest acid is:
(A) HCCH (B) C6H6
(C) C2H6 (D) CH3OH
source 1998 JEE
Hints
2. Visit http://iit-jee-chemistry.blogspot.com/2008/02/aldehydes-ketones-aldol-condensation.html
The oxidation state of nitrogen in HN3 is –3.
2. Which of the following will undergo aldol condensation :
(A) acetaldehyde (B) propanaldehyde
(C) benzaldehyde (D) trideuteroactaldehyde
3. Decrease in atomic number is observed during :
(A) alpha emission (B) beta emission
(C) positron emission (D) electron capture.
4. Benzenediazonium chloride on reaction with phenol in weakly basic medium gives :
(A) diphenyl ether (B) p-hydroxyazobenzene
(C) chlorobenzene (D) benzene
5. Among the following compounds, the strongest acid is:
(A) HCCH (B) C6H6
(C) C2H6 (D) CH3OH
source 1998 JEE
Hints
2. Visit http://iit-jee-chemistry.blogspot.com/2008/02/aldehydes-ketones-aldol-condensation.html
IIT JEE Chemistry Final Revision Sets No.35
1. State true or false
Fe2+ ion gives brown colour with ammonium thiocyanate.
2.state true or false
In silver atom, 23 electrons have a spin of one type and 24 of the opposite type.
3. The geometry and the type of hybrid orbital present about the central atom in BF3 is:
(A) linear, sp (B) trigona planar, sp2
(C) tetrahedral, sp3 (D) pyramidal, sp3
4. Benzyl chloride (C6H5CH2CI) can be prepared from toluene by chlorination with :
(A) SO2CI2 (B) SOCI2
(C) CI2 (D) NaOCI
5. Addition of high proportions of manganese makes steel useful in making rails
(A) gives hardness to steel.
(B) helps the formation of oxides of iron.
(C) can remove oxygen and sulphur
(D) can show highest oxidation state of +7.
Fe2+ ion gives brown colour with ammonium thiocyanate.
2.state true or false
In silver atom, 23 electrons have a spin of one type and 24 of the opposite type.
3. The geometry and the type of hybrid orbital present about the central atom in BF3 is:
(A) linear, sp (B) trigona planar, sp2
(C) tetrahedral, sp3 (D) pyramidal, sp3
4. Benzyl chloride (C6H5CH2CI) can be prepared from toluene by chlorination with :
(A) SO2CI2 (B) SOCI2
(C) CI2 (D) NaOCI
5. Addition of high proportions of manganese makes steel useful in making rails
(A) gives hardness to steel.
(B) helps the formation of oxides of iron.
(C) can remove oxygen and sulphur
(D) can show highest oxidation state of +7.
IIT JEE Chemistry Final Revision Sets No.34
1. State true or false.
A unit cell of an ionic crystal shares some of its ions with other unit cells.
2. State true or false.
Fe3+ ion gives red colour with potassium thiocyanate.
3. State true or false.
The electronic configuration of Cr is [Ar] 3d5 4s1.
4. Among the following compounds, which will react with acetone to give a product containing >C = N – :
(A) C6H5NH2 (B) (CH3)3 N
(C) C6H5NHC6H5 (D) C6H5NHNH2
5. Which of the following compounds will show geometrical isomerism:
(A) 2-butene (B) propone
(C) 1-phenylpropene (D) 2-methyl-2-butene
Source: 1998 JEE
A unit cell of an ionic crystal shares some of its ions with other unit cells.
2. State true or false.
Fe3+ ion gives red colour with potassium thiocyanate.
3. State true or false.
The electronic configuration of Cr is [Ar] 3d5 4s1.
4. Among the following compounds, which will react with acetone to give a product containing >C = N – :
(A) C6H5NH2 (B) (CH3)3 N
(C) C6H5NHC6H5 (D) C6H5NHNH2
5. Which of the following compounds will show geometrical isomerism:
(A) 2-butene (B) propone
(C) 1-phenylpropene (D) 2-methyl-2-butene
Source: 1998 JEE
IIT JEE Chemistry Final Revision Sets No.33
1. State true or false
The coordination number of each type of ion in CsCI crystal is 8.
2. State true or false
Fe2+ ion gives blue precipitate with potassium ferricyanide.
3. State true or false
The magnetic quantum number may have a negative value.
4. The standard reduction potential values of three metallic cations, X, Y, Z are 0.52, –3.03 and –1.18V respectively. The order of reducing power of the corresponding metals is:
(A) Y > Z > X (B) X > Y > Z
(C) Z > Y > X (D) Z > X > Y
5. White phosphorus (P4) has :
(A) six P–P single bonds (B) four P–P single bonds
(C) four lone pairs of electrons (D) PPP angle of 60°.
The coordination number of each type of ion in CsCI crystal is 8.
2. State true or false
Fe2+ ion gives blue precipitate with potassium ferricyanide.
3. State true or false
The magnetic quantum number may have a negative value.
4. The standard reduction potential values of three metallic cations, X, Y, Z are 0.52, –3.03 and –1.18V respectively. The order of reducing power of the corresponding metals is:
(A) Y > Z > X (B) X > Y > Z
(C) Z > Y > X (D) Z > X > Y
5. White phosphorus (P4) has :
(A) six P–P single bonds (B) four P–P single bonds
(C) four lone pairs of electrons (D) PPP angle of 60°.
IIT JEE Chemistry Final Revision Sets No.32
1. State true or false.
The length of the unit cell in NaCI is 552 pm. ( rNa+ = 95 pm; rCI- =181 pm).
2. Sodium nitrate decomposes above –800°C to give :
(A) N2 (B) O2
(C) NO2 (D) Na2O
3. State true or false
Fe3+ ion gives brown colour with potassium ferricyanide.
4. A new carbon-carbon bond formation is possible in
(A) Cannizzaro reaction (B) Friedel-Crafts alkylation
(C) Clemmensen reduction (D) Reimer-Tiemann reaction
5. Which of the following will react with water :
(A) CHCI3 (B) CI3CCHO
(C) CCI4 (D) CICH2CH2CI
The length of the unit cell in NaCI is 552 pm. ( rNa+ = 95 pm; rCI- =181 pm).
2. Sodium nitrate decomposes above –800°C to give :
(A) N2 (B) O2
(C) NO2 (D) Na2O
3. State true or false
Fe3+ ion gives brown colour with potassium ferricyanide.
4. A new carbon-carbon bond formation is possible in
(A) Cannizzaro reaction (B) Friedel-Crafts alkylation
(C) Clemmensen reduction (D) Reimer-Tiemann reaction
5. Which of the following will react with water :
(A) CHCI3 (B) CI3CCHO
(C) CCI4 (D) CICH2CH2CI
IIT JEE Chemistry Final Revision Sets No.31
1. Highly pure dilute solution of sodium in liquid ammonia :
(A) Shows blue colour
(B) exhibits electrical conductivity
(C) produces sodium amide
(D) produces hydrogen gas
2. p-Chloroaniline and anilinium hydrochloride can be distinguished by:
(A) Sandmeyer reaction (B) NaHCO3 (C) AgNO3 (D) Carbylamine test
3. The energy of an electron in the first Bohr orbit of H atom is – 13.6 eV. The possible energy value(s) of the excited state(s) for electrons in Bohr orbits of hydrogen is(are) :
(a) – 3.4 eV (b) – 4.2 eV (c) – 6.8 eV (d) + 6.8 eV
4. 6. In nitroprusside ion the iron and NO exist as Fe(II) and NO+ rather than Fe(III) and NO.
These forms can be differentiated by :
(A) estimating the concentration of iron.
(B) measuring the concentration of CN.
(C) measuring the solid state magnetic moment.
(D) thermally decomposing the compound.
5. State true or false.
A metal that crystallizes in bcc structure has a coordination number of 12.
(A) Shows blue colour
(B) exhibits electrical conductivity
(C) produces sodium amide
(D) produces hydrogen gas
2. p-Chloroaniline and anilinium hydrochloride can be distinguished by:
(A) Sandmeyer reaction (B) NaHCO3 (C) AgNO3 (D) Carbylamine test
3. The energy of an electron in the first Bohr orbit of H atom is – 13.6 eV. The possible energy value(s) of the excited state(s) for electrons in Bohr orbits of hydrogen is(are) :
(a) – 3.4 eV (b) – 4.2 eV (c) – 6.8 eV (d) + 6.8 eV
4. 6. In nitroprusside ion the iron and NO exist as Fe(II) and NO+ rather than Fe(III) and NO.
These forms can be differentiated by :
(A) estimating the concentration of iron.
(B) measuring the concentration of CN.
(C) measuring the solid state magnetic moment.
(D) thermally decomposing the compound.
5. State true or false.
A metal that crystallizes in bcc structure has a coordination number of 12.
Saturday, October 3, 2009
IIT JEE Chemistry Final Revision Set 30
1. A sample of AgC1 was treated with 5.00 mL of 1.5 M Na2CO3 solution to give
Ag2CO3. The remaining solution contained 0.0026 g of C1- per litre. Calculate the solubility product of AgC1 (KspAg2CO3) = 8.2 x 10-12)
2. The rate constant for the first order decomposition of a certain reaction is
described by the equation
log (k/s-1) = 14.34 – (1.25 x 104 K)/T
What is the energy of activation for this reaction?
3. Compute the heat of formation of liquid methyl alcohol is kilojoules per mole,
using the following data. Heat of vaporization of liquid methyl alcohol = 38
kJ/mol. Heat of formation of gaseous atoms from the elements in their
standard states: H, 218 kJ/mol; C, 715 kJ/mol; O, 249 kJ/mol
Average bond energies:
C – H, 415 kJ/mol
C– O, 356 kJ/mol
O – H, 463 kJ/mol
4. To a 25 mL H2O2 solution, excess of acidified solution of potassium iodide
was added. The iodine liberated required 20 mL of 0.3 N sodium thiosulphate
solution. Calculate the volume strength of H2O2 solution.
5. Write balanced equation for
Treating phosphorus with concentrated nitric acid.
Ag2CO3. The remaining solution contained 0.0026 g of C1- per litre. Calculate the solubility product of AgC1 (KspAg2CO3) = 8.2 x 10-12)
2. The rate constant for the first order decomposition of a certain reaction is
described by the equation
log (k/s-1) = 14.34 – (1.25 x 104 K)/T
What is the energy of activation for this reaction?
3. Compute the heat of formation of liquid methyl alcohol is kilojoules per mole,
using the following data. Heat of vaporization of liquid methyl alcohol = 38
kJ/mol. Heat of formation of gaseous atoms from the elements in their
standard states: H, 218 kJ/mol; C, 715 kJ/mol; O, 249 kJ/mol
Average bond energies:
C – H, 415 kJ/mol
C– O, 356 kJ/mol
O – H, 463 kJ/mol
4. To a 25 mL H2O2 solution, excess of acidified solution of potassium iodide
was added. The iodine liberated required 20 mL of 0.3 N sodium thiosulphate
solution. Calculate the volume strength of H2O2 solution.
5. Write balanced equation for
Treating phosphorus with concentrated nitric acid.
IIT JEE Chemistry Final Revision Set 29
Fill in the blanks
(i) In the reaction I- + I2 → I3-, the Lewis acid is ____.
(ii) Silver jewellery items tarnish slowly in the air due to the reaction with _____.
(iii) Compounds that formally contain Pb4+ are easily reduced to Pb2+. The
stability of the lower oxidation state is due to ____.
(iv) Glycerine container one _____ hydroxy group.
(v) 1, 3-Butadiene with bromine in molar ratio generates predominantly ____.
(i) In the reaction I- + I2 → I3-, the Lewis acid is ____.
(ii) Silver jewellery items tarnish slowly in the air due to the reaction with _____.
(iii) Compounds that formally contain Pb4+ are easily reduced to Pb2+. The
stability of the lower oxidation state is due to ____.
(iv) Glycerine container one _____ hydroxy group.
(v) 1, 3-Butadiene with bromine in molar ratio generates predominantly ____.
IIT JEE Chemistry Final Revision Set 28
1. When cyclohexane is poured on water, it floats, because:
(A) cyclohexane is in ‘boat’ form
(B) cyclohexane is in ‘chair’ form
(C) cyclohexane is in ‘crown’ form
(D) cyclohexane is less dense than water.
Fill in the blanks
(i) In the Arrhenius equation, k = A exp(–E|TR), A may be termed as the rate
constant at _____
(ii) When Fe(s) is dissolved in aqueous hydrochloric acid in a closed vessel, the
work done is _____
(iii) A liquid which is permanently supercooled is frequently called a _____
(iv) Enthalpy is an _____ property
Source:
JEE 1997 paper
(A) cyclohexane is in ‘boat’ form
(B) cyclohexane is in ‘chair’ form
(C) cyclohexane is in ‘crown’ form
(D) cyclohexane is less dense than water.
Fill in the blanks
(i) In the Arrhenius equation, k = A exp(–E|TR), A may be termed as the rate
constant at _____
(ii) When Fe(s) is dissolved in aqueous hydrochloric acid in a closed vessel, the
work done is _____
(iii) A liquid which is permanently supercooled is frequently called a _____
(iv) Enthalpy is an _____ property
Source:
JEE 1997 paper
IIT JEE Chemistry Final Revision Set 27
1. The number of moles of KmnO4 that will be needed to react with one mole of
sulphite ion in acidic solution is
(A) 2/5 (B) 3/5 (C) 4/5 (D) 1
2. Which of the following compounds has sp2 hybridization?
(A) CO2 (B) SO2
(C) N2O (D) CrO(O2)
3. Ammonium dichromate is used in some fireworks. The green coloured
powder blown in the air is
(A) CrO3 (B) Cr2O3 (C) Cr (D) CO
4. Which one of the following species is not a pseudohalide?
(A) CNO– (B) RCOO– (C) OCN– (D) NNN–
5. How many optically active stereoisomers are possible for butane-2, 3-diol?
(A) 1 (B) 2
(C) 3 (D) 4
sulphite ion in acidic solution is
(A) 2/5 (B) 3/5 (C) 4/5 (D) 1
2. Which of the following compounds has sp2 hybridization?
(A) CO2 (B) SO2
(C) N2O (D) CrO(O2)
3. Ammonium dichromate is used in some fireworks. The green coloured
powder blown in the air is
(A) CrO3 (B) Cr2O3 (C) Cr (D) CO
4. Which one of the following species is not a pseudohalide?
(A) CNO– (B) RCOO– (C) OCN– (D) NNN–
5. How many optically active stereoisomers are possible for butane-2, 3-diol?
(A) 1 (B) 2
(C) 3 (D) 4
IIT JEE Chemistry Final Revision Set 26
1. For a d-electron, the orbital angular momentum is
(A) √6 ( h/2π) (B) √2(h/2π)
(C) ( h/2π) (D) 2(h/2π)
2. The standard reduction potentials of Cu2+ | Cu and Cu2+ | Cu+ are 0.337 V
and 0.153 V respectively. The standard electrode potential of Cu+ | Cu half
cell is
(A) 0.184 V (B) 0.827 V
(C) 0.521 V (D) 0.490 V
3. The critical temperature of water is higher than that of O2 because the H2O
molecule has
(A) fewer electrons than O2 (B) two covalent bonds
(C) V-shape (D) dipole moment
4. Which molecule contains both polar and non-polar bonds?
(A) NH4C1 (B) HCN (C) H2O2 (D) CH4
5. The compressibility factor for an ideal gas is
(A) 1.5 (B) 1.0 (C) 2.0 (D) ∞
(A) √6 ( h/2π) (B) √2(h/2π)
(C) ( h/2π) (D) 2(h/2π)
2. The standard reduction potentials of Cu2+ | Cu and Cu2+ | Cu+ are 0.337 V
and 0.153 V respectively. The standard electrode potential of Cu+ | Cu half
cell is
(A) 0.184 V (B) 0.827 V
(C) 0.521 V (D) 0.490 V
3. The critical temperature of water is higher than that of O2 because the H2O
molecule has
(A) fewer electrons than O2 (B) two covalent bonds
(C) V-shape (D) dipole moment
4. Which molecule contains both polar and non-polar bonds?
(A) NH4C1 (B) HCN (C) H2O2 (D) CH4
5. The compressibility factor for an ideal gas is
(A) 1.5 (B) 1.0 (C) 2.0 (D) ∞
IIT JEE Chemistry Final Revision Set 25
1. The electrophilic addition of 1,3-butadiene produces
(a) 1,2-addition product only
(b) 1,4-addition product
(c) both 1,2- and 1,4- addition products which are not at equilibrium with each other
(d) both 1,2- and 1,4-addition products which are at equilibrium with each other
2. An alkene on treating with hot acidified KMnO4 gives 4-oxopentanoic acid. The alkene is
(a) pentene (b) 2-pentene
(c) 1-methylcyclobutene (d) 1,2-dimethylcyclopropene
3. An alkene on treating with hot acidified KMnO4 gives succinic acid. The alkene is:
(a) 1-butene (b) 2-butene (c) 2-methylbutene (d) cyclobutene
4. Statement : The freezing point of 0.05 M urea solution is different from that of 0.05 M sodium chloride solution.
Reason : The depression in freezing point is directly proportional to the number of species present in the solution.
State whether the statement is true or not and whether reason explains the statement or not.
5. Statement : If one component obeyed Raoult’s law over a certain range of composition, the other component would not obey Henry’s law in that range.
Reason : Raoult’s law is a special case of Henry’s law.
State whether the statement is true or not and whether reason explains the statement or not.
(a) 1,2-addition product only
(b) 1,4-addition product
(c) both 1,2- and 1,4- addition products which are not at equilibrium with each other
(d) both 1,2- and 1,4-addition products which are at equilibrium with each other
2. An alkene on treating with hot acidified KMnO4 gives 4-oxopentanoic acid. The alkene is
(a) pentene (b) 2-pentene
(c) 1-methylcyclobutene (d) 1,2-dimethylcyclopropene
3. An alkene on treating with hot acidified KMnO4 gives succinic acid. The alkene is:
(a) 1-butene (b) 2-butene (c) 2-methylbutene (d) cyclobutene
4. Statement : The freezing point of 0.05 M urea solution is different from that of 0.05 M sodium chloride solution.
Reason : The depression in freezing point is directly proportional to the number of species present in the solution.
State whether the statement is true or not and whether reason explains the statement or not.
5. Statement : If one component obeyed Raoult’s law over a certain range of composition, the other component would not obey Henry’s law in that range.
Reason : Raoult’s law is a special case of Henry’s law.
State whether the statement is true or not and whether reason explains the statement or not.
IIT JEE Chemistry Final Revision Set 24
1. ΔHvap = 30 kJ/mol and ΔSvap = 75Jmol-1 K-1 . The temperature ofthe vapour, at one atmosphere is going to be:
(a) 400 K (b) 350 K (c) 298 K (d) 250 K
2. Spin only magnetic moment of the compound Hg[Co(SCN)4] is
(a) √3 (b) √15 (c) √24 (d) √8
3. The treatment of CH3OH with CH3MgI releases 1.04 mL of a gas at STP. The mass of CH3OH
added is :
(a) 1.49 mg (b) 2.98 mg (c) 3.71 mg (d) 4.47 mg .
4. The addition of HBr to an alkene in the presence of peroxide is the example of
(a) electrophilic addition reaction
(b) nucleophilic addition reaction
(c) free radical addition reaction
(d) the formation of carbocation as an intermediate
5. The addition of Br2 to trans-2-butene produces
(a) (+)-2,3-dibromobutane (b) (-)-2,3-dibromobutane
(c) rac-2,3-dibromobutane (d) meso-2,3-dibromobutane
(a) 400 K (b) 350 K (c) 298 K (d) 250 K
2. Spin only magnetic moment of the compound Hg[Co(SCN)4] is
(a) √3 (b) √15 (c) √24 (d) √8
3. The treatment of CH3OH with CH3MgI releases 1.04 mL of a gas at STP. The mass of CH3OH
added is :
(a) 1.49 mg (b) 2.98 mg (c) 3.71 mg (d) 4.47 mg .
4. The addition of HBr to an alkene in the presence of peroxide is the example of
(a) electrophilic addition reaction
(b) nucleophilic addition reaction
(c) free radical addition reaction
(d) the formation of carbocation as an intermediate
5. The addition of Br2 to trans-2-butene produces
(a) (+)-2,3-dibromobutane (b) (-)-2,3-dibromobutane
(c) rac-2,3-dibromobutane (d) meso-2,3-dibromobutane
IIT JEE Chemistry Final Revision Set 23
1. When I- is oxidised by MnO4- in alkaline medium, I- converts into
(a) IO3- (b) I2 (c) IO4- (d) IO-
2. Which of the following pairs give positive Tollen's test?
(a) Glucose, sucrose (b) Glucose, fructose (c) Hexanal, acetophenone (d) Fructose, sucrose
3. How many chiral compounds are possible on mono chlorination of 2-methyl butane?
(a) 2 (b) 4 (c) 6 (d) 8
4. 2-hexyne gives trans-2-hexene on treatment with
(a) Li/NH (b) Pd/BaSO (c) LiAlH (d) Pt/H
5. 2 mol of an ideal gas expanded isothermally and reversibly from 1 litre to 10 litres at 300 K. What is the enthalpy change?
(a) 4.98 kJ (b) 11.47 kJ (c) -11.47 kJ (d) 0 kJ
(a) IO3- (b) I2 (c) IO4- (d) IO-
2. Which of the following pairs give positive Tollen's test?
(a) Glucose, sucrose (b) Glucose, fructose (c) Hexanal, acetophenone (d) Fructose, sucrose
3. How many chiral compounds are possible on mono chlorination of 2-methyl butane?
(a) 2 (b) 4 (c) 6 (d) 8
4. 2-hexyne gives trans-2-hexene on treatment with
(a) Li/NH (b) Pd/BaSO (c) LiAlH (d) Pt/H
5. 2 mol of an ideal gas expanded isothermally and reversibly from 1 litre to 10 litres at 300 K. What is the enthalpy change?
(a) 4.98 kJ (b) 11.47 kJ (c) -11.47 kJ (d) 0 kJ
IIT JEE Chemistry Final Revision Set 22
1. A sodium salt of an unknown anion when treated with MgCl2 gives white precipitate only on boiling.
The anion is
(a) SO42- (b) HCO3- (c) CO3 2- (d) NO3-
2. Which hydrogen like species will have same radius as that of Bohr orbit of hydrogen atom?
(a) n = 2, Li+2 (b) n = 2, Be3+ (c) n = 2, He+ (d) n = 3, Li2+
3. 0.004 M Na2SO4 is isotonic with 0.01 M glucose. Degree of dissociation of Na2SO4 is
(a) 75% (b) 50% (c) 25% (d) 85%
4. Number of lone pair(s) in XeOF4 is/are:
(a) 0 (b) 1 (c) 2 (d) 3
5. According to MO Theory,
(a) O2+ is paramagnetic and bond order greater than O2
(b) O2+ is paramagnetic and bond order less than O2
(c) O2+ is diamagnetic and bond order less than O2
(d) O2+ is diamagnetic and bond order is more than O2
The anion is
(a) SO42- (b) HCO3- (c) CO3 2- (d) NO3-
2. Which hydrogen like species will have same radius as that of Bohr orbit of hydrogen atom?
(a) n = 2, Li+2 (b) n = 2, Be3+ (c) n = 2, He+ (d) n = 3, Li2+
3. 0.004 M Na2SO4 is isotonic with 0.01 M glucose. Degree of dissociation of Na2SO4 is
(a) 75% (b) 50% (c) 25% (d) 85%
4. Number of lone pair(s) in XeOF4 is/are:
(a) 0 (b) 1 (c) 2 (d) 3
5. According to MO Theory,
(a) O2+ is paramagnetic and bond order greater than O2
(b) O2+ is paramagnetic and bond order less than O2
(c) O2+ is diamagnetic and bond order less than O2
(d) O2+ is diamagnetic and bond order is more than O2
IIT JEE Chemistry Final Revision Set 21
1. 2-phenyl propene on acidic hydration gives
(a) 2-phenyl-2-propanol (b) 2-phenyl-1-propanol
(c) 3-phenyl-1-propanol (d) 1-phenyl-2-propanol
2. Benzamide on treatment with POCl3 gives
(a) Aniline (b) Benzonitrile (c) Chlorobenzene (d) Benzyl amine
3. The methods chiefly used for the extraction of lead and tin from their ores are respectively
(a) Self reduction and carbon reduction (b) Self reduction and electrolytic reduction
(c) Carbon reduction and self reduction (d) Cyanide process and carbon reduction
4. (NH4)2Cr2O7 on heating gives a gas which is also given by
(a) Heating NH4NO2 (b) Heating NH4NO3 (c) Mg3N2 + H2O (d) Na(comp.) + H2O2
5. Spontaneous adsorption of a gas on solid surface is an exothermic process because:
(a)ΔH increases for system (b)ΔS increases for gas
(c)ΔS decreases for gas (d)ΔG increases for gas
Source:
JEE 2004 screening
(a) 2-phenyl-2-propanol (b) 2-phenyl-1-propanol
(c) 3-phenyl-1-propanol (d) 1-phenyl-2-propanol
2. Benzamide on treatment with POCl3 gives
(a) Aniline (b) Benzonitrile (c) Chlorobenzene (d) Benzyl amine
3. The methods chiefly used for the extraction of lead and tin from their ores are respectively
(a) Self reduction and carbon reduction (b) Self reduction and electrolytic reduction
(c) Carbon reduction and self reduction (d) Cyanide process and carbon reduction
4. (NH4)2Cr2O7 on heating gives a gas which is also given by
(a) Heating NH4NO2 (b) Heating NH4NO3 (c) Mg3N2 + H2O (d) Na(comp.) + H2O2
5. Spontaneous adsorption of a gas on solid surface is an exothermic process because:
(a)ΔH increases for system (b)ΔS increases for gas
(c)ΔS decreases for gas (d)ΔG increases for gas
Source:
JEE 2004 screening
IIT JEE Chemistry Final Revision Set 20
1. An organic compound E with molecular formula C5H8 on hydrogenation gives compound F with molecular formula (C5H12). Compound E on ozonolysis gives formaldehyde and 2-ketopropanal. Give the structural formula of compound E.
2. Give reason: Optically active 2-iodobutane on treatment with NaI in acetone gives a product which does not show optical activity.
3. Give reasons:
Acetic acid can be halogenated in the presence of P and Cl2 but formic acid cannot be halogenated in the same way.
4. Match the following
X------------------------Y
Decarboxylation---------Addition reaction
Ozonolysis--------------Soda lime
Williamson's synthesis--Structure of alkene
Dichloroethane----------Phenol
5. What is cannizzaro reaction?
Sources:
JEE 1995
Jee 1983
2. Give reason: Optically active 2-iodobutane on treatment with NaI in acetone gives a product which does not show optical activity.
3. Give reasons:
Acetic acid can be halogenated in the presence of P and Cl2 but formic acid cannot be halogenated in the same way.
4. Match the following
X------------------------Y
Decarboxylation---------Addition reaction
Ozonolysis--------------Soda lime
Williamson's synthesis--Structure of alkene
Dichloroethane----------Phenol
5. What is cannizzaro reaction?
Sources:
JEE 1995
Jee 1983
IIT JEE Chemistry Final Revision Set 19
1. When phenol is reacted with CHCl3 and NaOH followed by acidification, salicylaldehyde is obtained. Give the intermediate reactions.
2. A scarlet compound A is treated with con. HNO3 to give a chocolate brown precipitate B. Can you identify A? The precipitate B on warming with con. HNO3 in the presence of Mn(NO3)2 produces a pink-coloured solution due to the formation of C. Can you identify C.
3. Write down the structures of the stereoisomers formed when cis-2-butene is reacted with bromine.
4. There are _________ pi bonds in a nitrogen molecule.
5. The compound prepared by the action of magnesium on dry ethyl bromide in ether is known as _________ reagent.
Sources
JEE screening 1982
JEE 1995
2. A scarlet compound A is treated with con. HNO3 to give a chocolate brown precipitate B. Can you identify A? The precipitate B on warming with con. HNO3 in the presence of Mn(NO3)2 produces a pink-coloured solution due to the formation of C. Can you identify C.
3. Write down the structures of the stereoisomers formed when cis-2-butene is reacted with bromine.
4. There are _________ pi bonds in a nitrogen molecule.
5. The compound prepared by the action of magnesium on dry ethyl bromide in ether is known as _________ reagent.
Sources
JEE screening 1982
JEE 1995
Friday, October 2, 2009
IIT JEE Chemistry Final Revision Set 18
1. Give reasons: (SiH3)3N is a weaker base than (CH3)3N.
2. A 5.0 cm³ of H2O2 liberates 0.508 g of iodine from an acidified KI solution. Calculate the strength of H2O2 solution in terms of volume strength at STP.
3. 1,4-Pentadiene reacts with excess of HCl in the presence of benzoyl peroxide to give compound X which upon reaction with excess of Mg in dry ether forms Y. Compound Y on treatment with ethyl acetate followed by dilute acid yields Z. Identify the compounds X,Y and Z.
4. State whether the statement is true or false.
When PbO2 reacts with a dilute acid, it gives hydrogen peroxide.
5. State whether the statement is true or false.
Benzaldehyde undergoes aldol condensation in an alkaline medium
Sources: JEE 1995
JEE screening 1982
2. A 5.0 cm³ of H2O2 liberates 0.508 g of iodine from an acidified KI solution. Calculate the strength of H2O2 solution in terms of volume strength at STP.
3. 1,4-Pentadiene reacts with excess of HCl in the presence of benzoyl peroxide to give compound X which upon reaction with excess of Mg in dry ether forms Y. Compound Y on treatment with ethyl acetate followed by dilute acid yields Z. Identify the compounds X,Y and Z.
4. State whether the statement is true or false.
When PbO2 reacts with a dilute acid, it gives hydrogen peroxide.
5. State whether the statement is true or false.
Benzaldehyde undergoes aldol condensation in an alkaline medium
Sources: JEE 1995
JEE screening 1982
IIT JEE Chemistry Final Revision Set 17
1. Calculate the pH of an acqueous solution of 1.0 M ammonium formate assuming complete dissociation
(pKa of forming acid = 3.8 and pKb of ammonia = 4.8)
2. At 380°C, the half-life period for the first order decomposition of H2O2 is 360 min. The energy of activation of the reaction is 200 kJ mol‾¹. Calculate the time required for 75% decomposition at 450°C.
3. What are the products of reaction between MgCl2 and water at room temperature?
4. The compound with no dipole moment is
a. methyl chloride b. methylene chloride
c. carbon tetrachloride d. chloroform
5. Among the following, the compound that can be most readily sulphonated is
a. chlorobenzene b. nitrobenzene
c. toluene d. benzene
Sources: JEE paper 1995
Jee screenig 1982
(pKa of forming acid = 3.8 and pKb of ammonia = 4.8)
2. At 380°C, the half-life period for the first order decomposition of H2O2 is 360 min. The energy of activation of the reaction is 200 kJ mol‾¹. Calculate the time required for 75% decomposition at 450°C.
3. What are the products of reaction between MgCl2 and water at room temperature?
4. The compound with no dipole moment is
a. methyl chloride b. methylene chloride
c. carbon tetrachloride d. chloroform
5. Among the following, the compound that can be most readily sulphonated is
a. chlorobenzene b. nitrobenzene
c. toluene d. benzene
Sources: JEE paper 1995
Jee screenig 1982
IIT JEE Chemistry Final Revision Set 16
1. The nuclide 90Sr is absorbed by bones. This nuclide has a half life of 28.1 years. Suppose one microgram was absorbed by a new-born child, how much 90Sr will remain in his bones after 20 years?
2. Iodine molecule dissociates into atoms after absorbing light of 4500 A0. If one quantum of radiation is absorbed by each molecule, calculate, the kinetic energy of iodine atoms.
(Bond energy of I2 = 240 kJ mol-1
3. Write down the IUPAC name of [Co(NH3)5ONO]Cl2
4. Among the following, the molecule that is linear is
a. CO2 b. SO2
c. NO2 d. ClO2
5. The oxidation number of carbon in CH2O is
a. -2 b. +2
c. +4 d. 0
Sources: JEE paper 1995
JEE screening 1982
2. Iodine molecule dissociates into atoms after absorbing light of 4500 A0. If one quantum of radiation is absorbed by each molecule, calculate, the kinetic energy of iodine atoms.
(Bond energy of I2 = 240 kJ mol-1
3. Write down the IUPAC name of [Co(NH3)5ONO]Cl2
4. Among the following, the molecule that is linear is
a. CO2 b. SO2
c. NO2 d. ClO2
5. The oxidation number of carbon in CH2O is
a. -2 b. +2
c. +4 d. 0
Sources: JEE paper 1995
JEE screening 1982
IIT JEE Chemistry Final Revision Set No. 15
1. An organic compound A and C8H6 on treatment with dilute sulphuric acid containing mercuric sulphate gives a compound B, which can also be obtained from a reaction of benzene with an acid chloride in the presence of anhydrous aluminium chloride. Can you identify A and B.
2. Give reasons: In acylium ion, the structure R-C≡O+ is more stable tha the R-C+=0.
3. 8.0575×10-2 kg of Glauber's salt is dissolved in water to obtain 1 dm3 of a solution of density 1077.2 kgm-3. calculate the molarity, molality and mole fraction of Na2SO4 in the solution.
4. Is K3[VF6] coloured?
5. Complete and balance the reaction
Sn + 2KOH + 4H2O---> ...+...
2. Give reasons: In acylium ion, the structure R-C≡O+ is more stable tha the R-C+=0.
3. 8.0575×10-2 kg of Glauber's salt is dissolved in water to obtain 1 dm3 of a solution of density 1077.2 kgm-3. calculate the molarity, molality and mole fraction of Na2SO4 in the solution.
4. Is K3[VF6] coloured?
5. Complete and balance the reaction
Sn + 2KOH + 4H2O---> ...+...
IIT JEE Chemistry Final Revision Set No. 14
1. Is the complex [Ti(NO3)4] coloured?
2. Is the complex [Cr(NH3)6]3+3Cl- coloured?
3. Give reasons: Although aluminium is above hydrogen in the electrochemical series, it is stable in air and water.
4. give reasons: Aryl halides are less reactive than alkyl halides towards nucleophilic reagents.
5. Sodium metal crystallises in body centred cubic lattice with the cell edge, a = 4.29 A0. What is the radius of sodium atom?
Source: JEE 1994 paper
2. Is the complex [Cr(NH3)6]3+3Cl- coloured?
3. Give reasons: Although aluminium is above hydrogen in the electrochemical series, it is stable in air and water.
4. give reasons: Aryl halides are less reactive than alkyl halides towards nucleophilic reagents.
5. Sodium metal crystallises in body centred cubic lattice with the cell edge, a = 4.29 A0. What is the radius of sodium atom?
Source: JEE 1994 paper
Thursday, October 1, 2009
IIT JEE Final Revision Set 13
1. When a gas A is passed through dry KOH at low temperature, a deep red-coloured compound, B and gas C are obtained. The gas A on reaction with but-2-ene, followed by treatment with Zn/H2O yields acetaldehyde. Identify A, B and C.
2. Write the conversion process for converting benzene into 4-Nitrobenzaldehyde.
3. A 4:1 molar mixture of He and CH4 is contained in a vessel at 20 bar pressure. Due to a hole in the vessel the gas mixture leaks out. What is the composition of the mixture effusing out initially?
4. What is the number of waves made by a Bohr electron in one complete revolution in its third orbit?
5. t-butanol and n-butanol are separately treated with a few drops of dilute KMnO4. In one case, the purple colour disappears and a brown precipitate is formed. Which of the two alcohols gives the above reaction?
Source: 1994 JEE paper
2. Write the conversion process for converting benzene into 4-Nitrobenzaldehyde.
3. A 4:1 molar mixture of He and CH4 is contained in a vessel at 20 bar pressure. Due to a hole in the vessel the gas mixture leaks out. What is the composition of the mixture effusing out initially?
4. What is the number of waves made by a Bohr electron in one complete revolution in its third orbit?
5. t-butanol and n-butanol are separately treated with a few drops of dilute KMnO4. In one case, the purple colour disappears and a brown precipitate is formed. Which of the two alcohols gives the above reaction?
Source: 1994 JEE paper
IIT JEE Final Revision Set 12
1. At temperature, T, a compound AB2(g) dissociates according to the reaction
2AB2(g)↔ 2AB(g) + B2(g)with a degree of dissociation x, which is small in compared with unity. What is the expression for x in terms of the equilibrium constant, Kp and the total pressure P.
2. For the reaction [Ag(CN)2]- ↔ Ag+ +2CN-, the equilibrium constant at 25°C is 4.0×10-19. Find the silver ion concentration in a solution which was originally 0.10 molar in KCN and 0.03 molar in AgNO3.
3. According to VSEPR theory, what is the type of hybridization in OF2?
4. The composition of a sample of wustite is Fe0.93O1.00. What percentage of the iron is present in the form of Fe(III)?
5. A is a binary compound of a univalent metal. 1.422 g of A reacts completely with 0.321 g of sulphur in an evacuated and sealed tube to give 1.743 g of a white crystalline solid B that forms a hydrated double salt, C with Al2(SO4)3. Identify A,B and C.
(Source: 1994 JEE Question Paper)
2AB2(g)↔ 2AB(g) + B2(g)with a degree of dissociation x, which is small in compared with unity. What is the expression for x in terms of the equilibrium constant, Kp and the total pressure P.
2. For the reaction [Ag(CN)2]- ↔ Ag+ +2CN-, the equilibrium constant at 25°C is 4.0×10-19. Find the silver ion concentration in a solution which was originally 0.10 molar in KCN and 0.03 molar in AgNO3.
3. According to VSEPR theory, what is the type of hybridization in OF2?
4. The composition of a sample of wustite is Fe0.93O1.00. What percentage of the iron is present in the form of Fe(III)?
5. A is a binary compound of a univalent metal. 1.422 g of A reacts completely with 0.321 g of sulphur in an evacuated and sealed tube to give 1.743 g of a white crystalline solid B that forms a hydrated double salt, C with Al2(SO4)3. Identify A,B and C.
(Source: 1994 JEE Question Paper)
Saturday, September 26, 2009
JEE Chemistry Final Revision Set No. 11
1. 9.75 g of a substance when dissolved in 72.0 g of water, lowered its vapour pressure by 0.5 mm at a given temperature. The vapour pressure of water at this temperature is 25.0 mm. Calculate the molecular weight of solute.
2. Blood freezes at 272.44 K and a solution of 6.0 gm of Urea in 500 gm of water freezes at 272.63 K. Calculate osmotic pressure of blood at 310 K. (Assume density of blood at 310 K to be 1 g/cc).
3. Acetic acid in benzene forms a dimer. 1.65 gm of acetic acid when dissolved in 100 gm of benzene raised bte boiling point by 0.36°C. Calculate the Van't Hoff factor.
(kb for benzene = 2.57°C/m).
4. The heat of formation of ethane is -19.46 kcal. Bond energies of C-C, C-H and H-H are 80.0, 99.0 and 104.18kcal respectively. Calculate the heat of atomisation of graphite. (Answer: 171 kcal).
5. The standard molar enthalpies of formation of cyclohexane (liquid) and benzene(liquid) at 25°C are -156 and +49 kJ/mol respectivley. The standard enthalpy of hydrogenation of cyclohexane (liquid) at 25°C is -119 kJ/mol. Use these data to estimate the magnitude of the resonance energy of benzene. (Answer: -152 kJ/mol)
2. Blood freezes at 272.44 K and a solution of 6.0 gm of Urea in 500 gm of water freezes at 272.63 K. Calculate osmotic pressure of blood at 310 K. (Assume density of blood at 310 K to be 1 g/cc).
3. Acetic acid in benzene forms a dimer. 1.65 gm of acetic acid when dissolved in 100 gm of benzene raised bte boiling point by 0.36°C. Calculate the Van't Hoff factor.
(kb for benzene = 2.57°C/m).
4. The heat of formation of ethane is -19.46 kcal. Bond energies of C-C, C-H and H-H are 80.0, 99.0 and 104.18kcal respectively. Calculate the heat of atomisation of graphite. (Answer: 171 kcal).
5. The standard molar enthalpies of formation of cyclohexane (liquid) and benzene(liquid) at 25°C are -156 and +49 kJ/mol respectivley. The standard enthalpy of hydrogenation of cyclohexane (liquid) at 25°C is -119 kJ/mol. Use these data to estimate the magnitude of the resonance energy of benzene. (Answer: -152 kJ/mol)
Thursday, September 10, 2009
IIT JEE Chemistry Final Revision Set No. 10
1. Calculate the equilibrium constant for the reaction,
2Fe3+ + 3I- ↔ 2Fe2+ + I3-.
The standard reduction potentials in acidic condition are 0.77 and 054 V respectively for Fe3+/Fe2+ and I3-/I- couples.
2. The hardest Boron Compound is
a. BN
b. B2O3
c. B4C
d. NaBO2
3. A solution of (+)-2-chloro-2-phenylethane in toluene racemizes slow in the presence small amount of ______________ due to the formation of ___________ .
4. CuCl has a similar structure as of Zinc blend and its structure density is 3.4 g/cm³. What is the length of unit cell edge?
a. 802pm
b. 578pm
c. 662pm
d. 678pm
5. Assertion-Reason type
Statement:For each ten degree rise of temperature the specific rate constant is nearly doubled.
Reason: Engery-wise distribution of molecules in a gas is an experimental function of temperature.
2Fe3+ + 3I- ↔ 2Fe2+ + I3-.
The standard reduction potentials in acidic condition are 0.77 and 054 V respectively for Fe3+/Fe2+ and I3-/I- couples.
2. The hardest Boron Compound is
a. BN
b. B2O3
c. B4C
d. NaBO2
3. A solution of (+)-2-chloro-2-phenylethane in toluene racemizes slow in the presence small amount of ______________ due to the formation of ___________ .
4. CuCl has a similar structure as of Zinc blend and its structure density is 3.4 g/cm³. What is the length of unit cell edge?
a. 802pm
b. 578pm
c. 662pm
d. 678pm
5. Assertion-Reason type
Statement:For each ten degree rise of temperature the specific rate constant is nearly doubled.
Reason: Engery-wise distribution of molecules in a gas is an experimental function of temperature.
IIT JEE Chemistry Final Revision Set No. 9
1. A first order reaction is 50% complete in 30 minutes at 27°C and in 10 minutes at 47°C. Calculate the reaction rate constant at 27°C and the energy of activation of the reaction in kJ/mole.
2. Assertion Reason Type
Statement : The order of reaction cannot have a fractional value.
Reason: For an elementary reaction, the partial orders are determined by the reaction stoichiometry.
3. An element crystallises in a structure having fcc unit cell of an edge 200pm. What is the density if 200g of it contains 24×1023 atoms?
a. 43.6 g
b. 44.6 g
c. 42.6 g
d. 41.6 g
4. Give the steps for converting Ethylbenzene to 2-phenylpropionic acid.
5. the standard reduction potential of the Ag+/Ag electrode at 298K is 0.799 V. Given that for AgI, Ksp = 8.7×10-17, evaluate the potential of the Ag+/Ag electrode in a saturaded solution of AgI.
2. Assertion Reason Type
Statement : The order of reaction cannot have a fractional value.
Reason: For an elementary reaction, the partial orders are determined by the reaction stoichiometry.
3. An element crystallises in a structure having fcc unit cell of an edge 200pm. What is the density if 200g of it contains 24×1023 atoms?
a. 43.6 g
b. 44.6 g
c. 42.6 g
d. 41.6 g
4. Give the steps for converting Ethylbenzene to 2-phenylpropionic acid.
5. the standard reduction potential of the Ag+/Ag electrode at 298K is 0.799 V. Given that for AgI, Ksp = 8.7×10-17, evaluate the potential of the Ag+/Ag electrode in a saturaded solution of AgI.
Tuesday, September 8, 2009
IIT JEE Chemistry Final Revision Set 8
1. The amount of glucose obtained by the hydrolysis of one mole maltose is _____ .
2. State true or false.
The movement of the dispersed phase towards one of the electrodes of an electric field is called cataphoresis.
3. The standard reductin potential for Cu2+/Cu is 0.34V. Calculate the reduction potential at pH = 14 for the above couple.
Take Ksp of Cu(OH) as 1×10-19
4. A current of 3.7 A is passed for 6 hrs. between Ni electrodes in 0.5L of 2M solution of Ni(NO3)2. What is the molarity of solution at the end of eletrolysis.
5. State whether the following statements are true or false.
In the case of nitration of arenes
(i). All activating sustituents are ortho, para directors.
(ii) Halogen substituents ae slightly deactivating but or ortho, para-directing.
(iii) Strongly deactivating substituents are meta directors.
2. State true or false.
The movement of the dispersed phase towards one of the electrodes of an electric field is called cataphoresis.
3. The standard reductin potential for Cu2+/Cu is 0.34V. Calculate the reduction potential at pH = 14 for the above couple.
Take Ksp of Cu(OH) as 1×10-19
4. A current of 3.7 A is passed for 6 hrs. between Ni electrodes in 0.5L of 2M solution of Ni(NO3)2. What is the molarity of solution at the end of eletrolysis.
5. State whether the following statements are true or false.
In the case of nitration of arenes
(i). All activating sustituents are ortho, para directors.
(ii) Halogen substituents ae slightly deactivating but or ortho, para-directing.
(iii) Strongly deactivating substituents are meta directors.
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