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99 Percentile Qs Bank for JEE MainChemistryp Block Elements (Group 15, 16, 17 & 18)

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?

Options

  1. AThe bond energy of HF   molecules is greater than in other hydrogen halides.
  2. BThe effect of nuclear shielding is much reduced in fluorine, which polarises the HF   molecule.
  3. CThe electronegativity of fluorine is much higher than for the other elements in the group
  4. DThere is strong hydrogen bonding between the HF   molecules.

Correct answer

D. There is strong hydrogen bonding between the HF   molecules.

Step-by-step solution

The higher boiling point of hydrogen fluoride is due to their strong hydrogen bonding between the HF molecules.

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