15
MCQ (Single Correct Answer)
Chlorobenzene is formed by reaction of chlorine with benzene in the presence of $\mathrm{AlCl}_3$. Which of the following species attacks the benzene ring in this reaction?
A
$\mathrm{Cl}^{-}$
B
$\mathrm{Cl}^{+}$
C
$\mathrm{AlCl}_3$
D
$\left[\mathrm{AlCl}_4\right]^{-}$
16
MCQ (Single Correct Answer)
Ethylidene chloride is a/an ........... .
A
vic-dihalide
B
gem-dihalide
C
allylic halide
D
vinylic halide
17
MCQ (Single Correct Answer)
What is 'A' in the following reaction?
A
B
C
D
18
MCQ (Single Correct Answer)
A primary alkyl halide would prefer to undergo ......... .
A
$S_N 1$ reaction
B
$\mathrm{S}_{\mathrm{N}} 2$ reaction
C
$\alpha$-elimination
D
racemisation
19
MCQ (Single Correct Answer)
Which of the following alkyl halides will undergo $S_N 1$ reaction most readily?
A
$\left(\mathrm{CH}_3\right)_3 \mathrm{C}-\mathrm{F}$
B
$\left(\mathrm{CH}_3\right)_3 \mathrm{C}-\mathrm{Cl}$
C
$\left(\mathrm{CH}_3\right)_3 \mathrm{C}-\mathrm{Br}$
D
$\left(\mathrm{CH}_3\right)_3 \mathrm{C}-\mathrm{I}$