Question

Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their

• A. More extensive association of carboxylic acid via van der Waals force of attraction.
• B. Formation of carboxylate ion
• C. Formation of intramolecular H-bonding
• D. Formation of intermolecular H-bonding

Answer 1

The correct option is D Formation of intermolecular H-bonding

Due to the formation of intermolecular H-bonding in carboxylic acids, association occurs. Hence the boiling point increases and is more than the boiling point of aldehydes, ketones and alcohols of comparable molecular masses.