Question

Select the incorrect option from the following regarding the physical properties of alcohol and phenol.

• A. The boiling point of alcohols and phenols are higher in comparison to hydrocarbons, ethers, haloalkanes and haloarenes of comparable molecular masses
• B. Ethanol and propane have comparable boiling points but differ only in the molecular masses
• C. The $OH$ group in alcohols and phenols is involved in the intermolecular hydrogen bonding
• D. The trend of boiling point is ethanol > methoxymethane > propane

Answer 1

Answer: (B)

The - $OH$ group in alcohols and phenols is involved in the intermolecular hydrogen bonding which is responsible for high boiling point of alcohols and phenols.
Thus, the boiling points of alcohols and phenols are higher in comparison to other class of compounds, namely
hydrocarbons, ethers, haloalkanes and haloarenes of comparable molecular masses.
The boiling point varies as