Practical Organic Chemistry: Reduction reactions MCQ

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Reduction reactionsMediumQuestion 910004

Question

Wolff-Kishner reduction converts ketones to alkanes using:

A
N₂H₄ (hydrazine) + KOH at high temperature
Correct
B
Zn(Hg)/HCl (Clemmensen)
C
LiAlH₄
D
H₂/Pd

Correct answer

N₂H₄ (hydrazine) + KOH at high temperature

Explanation

Wolff-Kishner: ketone → hydrazone (NH₂NH₂) → alkane in strongly basic (KOH) high-T conditions. Compare Clemmensen: Zn(Hg)/conc. HCl (acidic). Both reduce C=O → CH₂. Choose Wolff-Kishner for acid-sensitive substrates.

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