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NEET levelSingle correct optionDifficulty 1 of 3ro114

Which reagent converts the carbonyl group of acetophenone into a $CH X_{2}$ group under strongly basic conditions?

AZn-Hg and conc. $HCl$
B $N X_{2} H X_{4}$ and KOH in ethylene glycol, heat
C $NaBH X_{4}$ in methanol
D $LiAlH X_{4}$ followed by $H X_{3} O X^{+}$

Answer: B

The Wolff-Kishner reduction (

N X_{2} H X_{4}

, KOH, heat) converts C=O to

CH X_{2}

through the hydrazone in basic medium. Zn-Hg/HCl (Clemmensen) is acidic, while

NaBH X_{4}

and

LiAlH X_{4}

stop at the alcohol.

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