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Q.
Which of the following has the highest heat of vaporization?
NTA AbhyasNTA Abhyas 2020Chemical Bonding and Molecular Structure
Solution:
HF forms strong intermolecular H-bonds and other hydrogen halides do not form intermolecular H-bonds. Van der Waals forces increase from HCl to HI. Consequently, HF has highest heat of vaporization here.