(a) Aldehydes and ketones undergo a number of nucleophilic addition reactions. Why?
(b) Acetic acid is liquid while aromatic acids are solids, Give reasons.

Aldehydes and ketones undergo nucleophilic/electrophilic addition reactions.

Why are aldehydes more reavtice than ketones towards nucleophilic addition reactions ?

An aldehyde can give nucleophilic addition reaction with :

A : Aldehydes and ketones undergo nucleophilic addition reaction. R : Aldehydes and ketones contain carbonyl group.

(b) (i) Why do aldehydes and ketones undergo a large number of nucleophilic addition reactions. (ii) What is Gattermann-Koch reaction? Write chemical reaction involved in it.

Nucleophilic addition reactions of Aldehydes and Ketones- Part 2

Nucleophilic addition reactions of Aldehydes and Ketones- Part 1

Question based on Nucleophilic addition reactions of aldehydes and ketones

Ketones give nucleophilic addition reactions more readily than aldehydes.

Aldehydes and ketones undergo nucleophilic addition reactions. With weak nucleophiles such as ammonia and its derivatives, (H_2 N-Z) , aldehydes and ketones react in weakly acidic medium to form compounds containing carbonnitrogen double bond with the elimination of water to form . Aldehydes can be easily oxidised to carboxylic acid on treatment with common oxidising agents like KMnO_4 K_2 Cr_2 O_7 , HNO_3 , etc. The carboxylic acid formed contain the same number of carbon atoms as the aldehydes. However ketones under drastic conditions with powerful oxidising agents undergo cleavage of C-C bond giving mixture of carboxylic acids having lesser number of C atoms than the original ketone. Write the reaction of acetone with semicarbazide.