At room temperature, HCl is a gas while HF is low boiling liquid. This is because

Options

A. H - F bond is strong
B. H- F bond is weak
C. Molecules aggregate because of hydrogen bonding
D. HF is a weak acid

Answer

C

Explanation

HF forms inter-molecular hydrogen bonding so it exists as a low boiling liquid at room temperature. H - F bond is stroner than H - Cl but intramolecular forces will not affect the melting or boiling point (which depends on inter-molecular forces).