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5
MCQ (Single Correct Answer)

Benzylamine may be alkylated as shown in the following equation?

$$\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{NH}_2+\mathrm{R}-\mathrm{X} \longrightarrow \mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{NHR}$$

Which of the following alkyl halides is best suited for this reaction through $\mathrm{S}_{\mathrm{N}} 1$ mechanism?

A
$\mathrm{CH}_3 \mathrm{Br}$
B
$\mathrm{C}_6 \mathrm{H}_5 \mathrm{Br}$
C
$\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{Br}$
D
$\mathrm{C}_2 \mathrm{H}_5 \mathrm{Br}$
6
MCQ (Single Correct Answer)

Which of the following reagents would not be a good choice for reducing an aryl nitro compound to an amine?

A
$\mathrm{H}_2$ (excess) / Pt
B
$\mathrm{LiAlH}_4$ in ether
C
Fe and HCl
D
Sn and HCl
7
MCQ (Single Correct Answer)

In order to prepare a $1^{\circ}$ amine from an alkyl halide with simultaneous addition of one $\mathrm{CH}_2$ group in the carbon chain, the reagent used as source of nitrogen is ............ .

A
sodium amide, $\mathrm{NaNH}_2$
B
sodium azide, $\mathrm{NaN}_3$
C
potassium cyanide, KCN
D
potassium phthalimide $\mathrm{C}_6 \mathrm{H}_4(\mathrm{CO})_2 \mathrm{NK}^{+}$
8
MCQ (Single Correct Answer)

The source of nitrogen in Gabriel synthesis of amines is ........... .

A
sodium azide, $\mathrm{NaN}_3$
B
sodium nitrite, $\mathrm{NaNO}_2$
C
potassium cyanide, KCN
D
potassium phthalimide $\mathrm{C}_6 \mathrm{H}_4\left(\mathrm{CO}_2\right) \mathrm{N}^{-K^{+}}$
9
MCQ (Single Correct Answer)

Amongst the given set of reactants, the most appropriate for preparing $2^{\circ}$ amine is ............ .

A
$2^{\circ} \mathrm{R}-\mathrm{Br}+\mathrm{NH}_3$
B
$2^{\circ} \mathrm{R}-\mathrm{Br}+\mathrm{NaCN}$ followed by $\mathrm{H}_2 / \mathrm{Pt}$
C
$1^{\circ} \mathrm{R}-\mathrm{NH}_2+\mathrm{RCHO}$ followed by $\mathrm{H}_2 / \mathrm{Pt}$
D
$1^{\circ} R-\mathrm{Br}(2 \mathrm{~mol})+$ potassium phthalimide followed by $\mathrm{H}_3 \mathrm{O}^{+} /$heat
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