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Phenylmethyl ketone can be converted into ethylbenzene in one step by which of the following reagents?

1. LiAlH4
2. Zn-Hg/HCl
3. NaBH4
4. CH3MgI

Correct answer: Zn-Hg/HCl

Solution

Phenylmethyl ketone (acetophenone) can be reduced to ethylbenzene in one step using Zn-Hg/HCl, which is the Clemmensen reduction method. This reagent reduces the carbonyl group to a methylene group.

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