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Which of the following is/are effective for this conversion?

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${NH}_{3}$ (excess), heat, Na, $C_{2} H_{5} OH$

$N_{3} H$ , cold conc. $H_{2} {SO}_{4}$

${NH}_{3}$ (excess), heat, $NaOH$ , ${Br}_{2}$

${NH}_{2} - {NH}_{2}, H +$ ; ${NaNO}_{2}$ , $HCl;^{-} OH$ , $H_{2} O$

answer is B, C, D.

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Detailed Solution

(A) gives corresponding amine ${CH}_{3} {CH}_{2} - {CH}_{2} - {NH}_{2}$
(B) Schmidt reaction
(C) Hoffmann’s bromamide degradation
(D) Curtius reaction.

Hence, (2), (3) and (4) are correct.

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