Solution:
Due toresonance in carboxylate ion, the double bond character of C = O bond in carboxylic acids is greatly reduced as compared to that in aldehydes and ketones.
Carboxylic acid group does not give the usual addition and elimination reactions of aldehydes and ketones because
Due toresonance in carboxylate ion, the double bond character of C = O bond in carboxylic acids is greatly reduced as compared to that in aldehydes and ketones.