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Question 760014
JEE Chemistry · Hard

p-Block Elements: Mixed MCQ

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MixedHardQuestion 760014

Question

HF has higher boiling point than HCl despite lower molar mass because:
  1. A
    Strong intermolecular hydrogen bonding in HF
    Correct
  2. B
    Stronger van der Waals forces
  3. C
    HF is ionic
  4. D
    HF has higher molar mass

Correct answer

Strong intermolecular hydrogen bonding in HF

Explanation

F is the most electronegative element and forms very strong hydrogen bonds (F···H−F). These hydrogen bonds are stronger than the van der Waals forces in HCl, giving HF a much higher boiling point (19.5°C vs −85°C for HCl).

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