Question

As a result of intermolecular hydrogen bonding, carboxylic acids exists as ______

(a) acetals

(b) aldols

(c) hemiacetals

(d) dimers

This question was addressed to me in my homework.

I need to ask this question from Carboxylic Acids Physical Properties in section Aldehydes, Ketones and Carboxylic Acids of Chemistry – Class 12

Answer 1

Correct option is (d) dimers

For explanation: The intermolecular hydrogen bonds between carboxylic acids are not broken even in vapour phase. In fact, most carboxylic acids exist as dimer in vapour phase or in aprotic solvents.