Give reasons:(a) Electrophilic substitution in benzoic acid take place

1.	Give reasons:(a) Electrophilic substitution in benzoic acid take place at meta position.(b) Carboxylic acids are higherboiling liquids than aldehydes, ketones and alcohols of comparable molecular masses.(c) Propanal is more reactive than proanone in nucleophilic addition reactions.
Answer» (a) Because it is a deactivating group/Due to electron withdrawing carboxylic group resulting in decreased electron density at o- and p- position. (b) Due to extensive association of carboxylic acid molecules through intermolecular hydrogen bonding. (c) Due to steric and +I effect of two methyl groups in propanone.

Give reasons:(a) Electrophilic substitution in benzoic acid take place at meta position.(b) Carboxylic acids are higherboiling liquids than aldehydes, ketones and alcohols of comparable molecular masses.(c) Propanal is more reactive than proanone in nucleophilic addition reactions.

Answer»

(a) Because it is a deactivating group/Due to electron withdrawing carboxylic group resulting in decreased electron density at o- and p- position.

(b) Due to extensive association of carboxylic acid molecules through intermolecular hydrogen bonding.