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Question 830013
JEE Chemistry · Hard

Haloalkanes and Haloarenes: Mixed MCQ

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MixedHardQuestion 830013

Question

The order of boiling points of alkyl halides with same alkyl group is:
  1. A
    RI > RBr > RCl > RF
    Correct
  2. B
    RF > RCl > RBr > RI
  3. C
    All equal
  4. D
    Depends on alkyl group size

Correct answer

RI > RBr > RCl > RF

Explanation

Boiling point depends on van der Waals forces (London dispersion). Larger halogen atoms have higher polarisability → stronger London forces → higher boiling point. RI > RBr > RCl > RF for the same alkyl group.

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