Read the Assertion and Reason below and choose the correct option. — Solutions and Colligative Properties Chemistry Question

💡 Solution & Explanation

Vapour pressure is inversely related to the strength of intermolecular forces. Acetic acid forms very strong dimers due to hydrogen bonding, which persist even in the vapour phase, indicating its hydrogen bonding is stronger than that of water. Because water has weaker hydrogen bonds, it escapes more easily into the vapour phase, giving it a higher vapour pressure at the same temperature. Both are correct, and II explains I. Therefore, correct answer is A.