25
MCQ (Single Correct Answer)
Reaction of $\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{Br}$ with aqueous sodium hydroxide follows ........... .
A
$\mathrm{S}_{\mathrm{N}} 1$ mechanism
B
$\mathrm{S}_{\mathrm{N}} 2$ mechanism
C
Any of the above two depending upon the temperature of reaction
D
Saytzeff rule
26
MCQ (Single Correct Answer)
Which of the following compounds will give racemic mixture on nucleophilic substitution by $\mathrm{OH}^{-}$ion?
A
(i)
B
(i), (ii) and (iii)
C
(ii) and (iii)
D
(i) and (iii)
27
MCQ (Single Correct Answer)
Which of the carbon atoms present in the molecule given below are asymmetric?
A
1, 2, 3, 4
B
2, 3
C
1, 4
D
1, 2, 3
28
MCQ (Single Correct Answer)
Arrange the compounds in increasing order of rate of reaction towards nucleophilic substitution.
A
(i) < (ii) < (iii)
B
(iii) < (ii) < (i)
C
(i) < (iii) < (ii)
D
(iii) < (i) < (ii)
29
MCQ (Single Correct Answer)
Arrange the compounds in increasing order of rate of reaction towards nucleophilic substitution.
A
(i) < (ii) < (iii)
B
(i) < (iii) < (ii)
C
(iii) < (ii) < (i)
D
(ii) < (iii) < (i)