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NEET 2015
Exam
NEET
Year
2015
Subject
Chemistry
Chapter
p Block Elements (Group 15, 16, 17 & 18)

NEET 2015 · Chemistry · p Block Elements (Group 15, 16, 17 & 18)

The variation of the boiling points of the hydrogen halides is in...

The variation of the boiling points of the hydrogen halides is in the order HF>HI>HBr>HClHF > HI > HBr > HCl . Which of the following option explains the higher boiling point of hydrogen fluoride?

Options

  1. AThe electronegativity of fluorine is much higher than for other elements in the group.
  2. BThere is strong hydrogen bonding between HF\text{HF} molecules.
  3. CThe bond energy of HF\text{HF} molecules is greater than in other hydrogen halides.
  4. DThe effect of nuclear shielding is much reduced in fluorine which polarizes the HF\text{HF} molecule.

Correct answer

B. There is strong hydrogen bonding between HF\text{HF} molecules.

Step-by-step solution

Due to strong H-bonding in HF\text{HF} molecule, boiling point is highest for HF\text{HF}.

HF>HI>HBr>HClHF > HI > HBr > HCl
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