Question

$HF$ has highest boiling point among hydrogen halides, because it has:

• A. lowest dissociation enthalpy
• B. strongest van der Waal's interactions
• C. strongest hydrogen boding
• D. lowest ionic character

Answer 1

Answer: (C)

strongest hydrogen boding

$HF$ has the highest boiling point among hydrogen halides because it has the strongest hydrogen bonding.

In $HF$, there is a high electronegativity difference between H and F, thus they form strong intermolecular hydrogen bonding.