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