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NEET2019ChemistryClassification of Elements and Periodicity in PropertiesActual

Assertion : Bond energy of F ₂ is lesser than Cl ₂ . Reason : F-atom is smaller in size than 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 F ₂ is lesser than Cl ₂ because atomic size of F is smaller and three lone pairs on each F - atom cause relatively greater repulsive interactions.

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