WBJEE 2016 Chemistry Solved Paper

HF > HI > HBr > HCl
HF is hydrogen bonded, thus has highest boiling point, and it is liquid at or below 19°C. The remaining hydrogenhalides are gaseous and their boiling points depend on the van der Waals’ forces. Larger the size (or molecularmass), greater is the van der Waals’ forces, hence higher is the boiling point. Thus the order is HI > HBr > HCl and overall HF > HI > HBr > HCl