Q. The variation of the boiling points of the hydrogen halides is in the order HF > HI > HBr > HCl. What explains the higher boiling point of hydrogen fluoride ?
A) The bond energy of HF molecules is greater than in other hydrogen halides
B) The effect of nuclear shielding is much reduced in fluorine which polarises the HF molecule
C) The electronegativity of fluorine is much higher than for other elements in the group.
D) There is strong hydrogen bonding between HF molecules
Explanation
[Solution] Strong intermolecular hydrogen bonding raises the boiling point of HF. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.