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
10
MCQ (Single Correct Answer)
The best reagent for converting 2-phenylpropanamide into 2-phenylpropanamine is ........... .
A
excess $\mathrm{H}_2$
B
$\mathrm{Br}_2$ in aqueous NaOH
C
iodine in the presence of red phosphorus
D
$\mathrm{LiAlH}_4$ in ether
11
MCQ (Single Correct Answer)
The best reagent for converting, 2-phenylpropanamide into 1-phenylethanamine is ............ .
A
excess $\mathrm{H}_2 / \mathrm{Pt}$
B
$\mathrm{NaOH} / \mathrm{Br}_2$
C
$\mathrm{NaBH}_4 /$ methanol
D
$\mathrm{LiAlH}_4$ / ether
12
MCQ (Single Correct Answer)
Hofmann bromamide degradation reaction is shown by
A
$\mathrm{ArNH}_2$
B
$\mathrm{ArCONH}_2$
C
$\mathrm{ArNO}_2$
D
$\mathrm{ArCH}_2 \mathrm{NH}_2$