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AIIMS 201925 May
Exam
AIIMS
Year
2019
Date
25 May
Subject
Chemistry
Chapter
Classification of Elements and Periodicity in Properties

AIIMS 2019 · 25 May · Chemistry · Classification of Elements and Periodicity in Properties

Assertion : Bond energy of F_2 is lesser than Cl_2 . Reason :...

Assertion : Bond energy of F2\mathrm{F}_2 is lesser than Cl2\mathrm{Cl}_2. Reason : F-atom is smaller in size than Cl\mathrm{Cl}.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false.
  4. DIf both assertion and reason are false.

Correct answer

A. If both assertion and reason are true and reason is the correct explanation of assertion.

Step-by-step solution

Bond energy of F2\mathrm{F}_2 is lesser than Cl2\mathrm{Cl}_2 because atomic size of F\mathrm{F} is smaller and three lone pairs on each F\mathrm{F} - atom cause relatively greater repulsive interactions.
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