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