Question

HF has highest boiling point among hydrogen halides, because it has:
(A) lowest dissociation enthalpy (B) strongest van der Waals’ interactions
(C) strongest hydrogen bonding (D) lowest ionic character

Answer 1

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 intermolecular hydrogen bonding.