Boiling point is directly proportional to intermolecular Forces. Since Fluorine is highly electronegative element it forms hydrogen bonding. Because of H− bonding HF has high boiling point.

HF has highest boiling point among hydrogen halides, because it has:
Held on 9 Apr 2019 · Verified 6 Jul 2026.
lowest dissociation enthalpy
strongest van der Waals’ interactions
strongest hydrogen bonding
lowest ionic character
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