MHT CET 2025 Chemistry question

Not in JEE Main or NEET syllabus

Identify the correct decreasing order of boiling point for hydrides of halogens.

(A)HF> HCl > HBr >HI
(B)HI> HBr > HCl > HF
(C)HF > HI > HBr > HClCorrect
(D)HI > HF > HBr > HCl

Answer: (C)

Solution

Boiling points are HF 293 K, HI 237 K, HBr 206 K, HCl 188 K. HF is highest because of strong intermolecular hydrogen bonding (F is the most electronegative and smallest). From HCl to HI, there is no hydrogen bonding, and the boiling point rises with

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Question ID VK-101167