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Question: Answered & Verified by Expert
In the given transformation, which of the following is the most appropriate reagent?

ChemistryAldehydes and KetonesJEE MainJEE Main 2012 (Offline)
Options:
  • A
    $\mathrm{NH}_2 \mathrm{NH}_2, \stackrel{(-)}{\mathrm{OH}}$
  • B
    $\mathrm{Zn}-\mathrm{Hg} / \mathrm{HCl}$
  • C
    $\mathrm{Na}$, Liq. $\mathrm{NH}_3$
  • D
    $\mathrm{NaBH}_4$
Solution:
1485 Upvotes Verified Answer
The correct answer is:
$\mathrm{NH}_2 \mathrm{NH}_2, \stackrel{(-)}{\mathrm{OH}}$
$\mathrm{ZnHg} / \mathrm{HCl}$ can't be used due to the presence of acid sensitive group i.e. $\mathrm{OH}$


and $\mathrm{Na} / \mathrm{Liq} . \mathrm{NH}_3$ and $\mathrm{NaBH}_4$ convert $-\mathrm{CO}-$ into $-\mathrm{CH}(\mathrm{OH})-$

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