Based on alkane and alkene

PRACTICE PROBLEM
H
Me Me
Br2 Major product
h
H H
H
1.
The major product of the reaction is:

CH3 CH3 Br

(A) H3C CH CH2Br (B) H3C CBr CH3 (C) H3C CH2 CH2Br (D) H3C CH CH3


2. Find out the major product of the reaction :

Br

Na
dry ether




(A) (B) (C) (D)

3. Find out the major product of the reaction :

Br

Na
dry ether

Br




(A) (B) (C) (D)

4. Find out the correct order of rate of reaction will be :
(I) Na (II) Na
Br dry ether F dry ether

Na (IV)
Na
(III) Cl I
dry ether dry ether
(A) IV > III > I > II (B) III > IV > I > II (C) IV > I > III > II (D) None of these

, 5. Suitable reagent for thr given following conversion is :
O O O


OH OH



(A) Zn – Hg + HCl (B) Mg(Hg) (C) H-Br (D) All of these

6. Which of the following anion will be migrates towards anode to prepare 2,3-dimethyl butane in the
given reaction.

Kolbe
X electrolysis
2,3-dimethyl butane

O
O O O

O O O O
(A) (B) (C) (D)

7. Observe the following reaction :
O
H 2N-NH2 + KOH

Most stable conformer of product will be (across C2 – C3)
(A) Gauche (B) Anti (C) Eclipsed (D) Partially eclipsed

8. Observe the following reaction :
O
Zn-Hg + HCl


Most stable product wil be :
H
HH
H H


H H
Et H
Et H H
(A) (B)
H
H HH
H

H H
Me H
Me H H
(C) (D)