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Question

Which of the following compound is most reactive towards nucleophilic addition reactions?

A
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B
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C
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D
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Solution

The correct option is B
Aldehydes are generally more reactive than ketones in the nucleophilic reaction due to steric and electronic reasons. Benzaldehyde is less reactive than ethanal as the polarity of the carbonyl group is reduced in benzaldehyde due to resonance.
So, acetaldehyde is most reactive towards nucleophilic addition reactions.
Hence, option "B" is the correct answer.

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