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The increasing order of rate of HCN addition to following compounds is
A) HCHO
B) CH₃COCH₃
C) PhCOCH₃
D) PhCOPh

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C < D < B < A

A < B < C < D

D < B < C < A

D < C < B < A

answer is C.

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Detailed Solution

Addition of HCN is nucleophilic addition. Greater the electron deficiency of carbonyl group higher the rate of reaction.

Hence, D < C < B < A

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