question_answer

The formation of cyanohydrin from acetone is which type of reaction?

A)  Electrophilic substitution reaction

B)  Electrophilic addition reaction

C)  Nucleophilic addition reaction

D)  Nucleophilic substitution reaction

Correct Answer: C

Solution :

Ketone undergoes nucleophilic addition reaction because if nucleophiles attack first followed by electrophiles, anion is formed as intermediate and if electrophiles attack first followed by nucleophiles, cation, formed as intermediate. The stability of anion is more than cation, so nucleophiles attack first followed by electrophiles. So, probable mechanism will be