What is the dominant intermolecular force or bond that must be overcome in converting liquid $\mathrm{CH}_3 \mathrm{OH}$ to a gas ?

• Correct answer
  A

  Hydrogen bonding
• B

  Dipole-dipole interaction
• C

  Covalent bonds
• D

  London dispersion force

Solution

Key Idea When $\mathrm{H}$ atom is directly linked with $\mathrm{N}$ or $\mathrm{O}$, or $\mathrm{F}$, inter or interamolecular $\mathrm{H}$-bonding is formed. In between $\mathrm{CH}_3 \mathrm{OH}$ molecules intermolecular H-bonding exist.
Hence, it is the intermolecular H-bonding that must be overcome in converting liquid $\mathrm{CH}_3 \mathrm{OH}$ to gas.

Hence, the correct answer is option: 'A'.