(iv)
Rationalised 2023-24
255
Aldehydes, Ketones and Carboxylic Acids
ammonia derivatives, and Grignard reagents The a-hydrogens in aldehydes and
ketones are acidic Therefore, aldehydes and ketones having at least one a-hydrogen,
undergo Aldol condensation in the presence of a base to give a-hydroxyaldehydes
(aldol) and a-hydroxyketones(ketol), respectively Aldehydes having no a-hydrogen
undergo Cannizzaro reaction in the presence of concentrated alkali