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

Step-by-step solution

Cyanohydrin formation: This reaction is nucleophilic addition reaction. Step (i): The nucleophilic carbon in the cyanide adds to the electrophilic carbon in the polar carbonyl group, electrons from the C = O move to the electronegative O creating an intermediate alkoxide. Step (ii): An a c i d / b a s e reaction protonation of the alkoxide oxygen creates the cyanohydrin product.