Alcohols have **higher boiling points** than ethers of similar molecular weight because:
- Alcohols form intermolecular hydrogen bonds (O–H···O)
- Alcohols are less polar
- Ethers are gases
- Ethers can't dissolve
Show answer and solution
Correct answer: A. Alcohols form intermolecular hydrogen bonds (O–H···O)
Alcohols H-bond strongly through OH groups.
Ethers (R-O-R) lack OH, only weak dipole-dipole/dispersion forces.
**Example:** ethanol (b.p. 78 °C) vs dimethyl ether (b.p. −24 °C) — both C₂H₆O!