The reagent used in the Wolff-Kishner reduction is

1. $\mathrm{H}_2 \mathrm{~N}-\mathrm{NH}_2 / \mathrm{KOH}$
2. $\mathrm{H}_2 / \mathrm{Ni}$
3. $\mathrm{Sn} / \mathrm{HCl}$
4. $\mathrm{LiAlH}_4$

Solution

Wolff-Kishner reduction is done by heating the carbonyl compound with a mixture of hydrazine and $\mathrm{KOH}$ in the presence of ethylene glycol.

Asked in: AP EAMCET 2011

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