Question

The boiling point of phenols are higher than the hydrocarbons of comparable masses due to:

• A. more polarising power
• B. presence of hydrogen bonding
• C. resonance stabilisation
• D. acidic character

Answer 1

Answer: (B)

presence of hydrogen bonding

The boiling point of compound is effected by forces of attraction existing between molecules. Hydrogen bonding is a stronger force of attraction existing between molecules of phenols as compared to vander waals forces of attraction existing between alkane molecules. (they are weaker forces)
$\therefore$ Boiling point of phenol is more than hydrocarbon due to presence of hydrogen bonding.