Aldehydes, Ketones and Carboxylic Acids Part 1

NOTE : Addition of HCN to carbonyl compounds is nucleophilic addition reaction. The order of reactivity of carbonyl compounds is
Aldehydes (smaller to higher) Ketones (smaller to higher), Then
NOTE : The lower reactivity of Ketones is due to presence of two alkyl group which shows +I effect. The reactivity of Ketones decreases as the size of alkyl group increases.