MHT CET202617 April 2026Morning ShiftChemistryAlcohols Phenols and EthersActual
Which from the following is a correct decreasing order of boiling points for following organic compounds ?
Options
- AAldehyde > Ketone > Alcohol > Carboxylic acid
- BCarboxylic acid > Alcohol > Ketone > Aldehyde
- CKetone > Aldehyde > Carboxylic acid > Alcohol
- DAlcohol > Aldehyde > Ketone > Carboxylic acid
Correct answer
B. Carboxylic acid > Alcohol > Ketone > Aldehyde
Step-by-step solution
Boiling point depends on the strength of intermolecular forces. Carboxylic acids form strong intermolecular hydrogen bonds and exist as dimers, leading to the highest boiling points among compounds of comparable molecular mass. Alcohols also form intermolecular hydrogen bonds, but they are weaker than those in carboxylic acids. Ketones and aldehydes lack intermolecular hydrogen bonding but possess dipole-dipole interactions. Ketones have slightly higher boiling points than isomeric aldehydes due to the presence of