Assertion: F - F bond has low bond dissociation energy. Reason: The fluorine has lower reactivity.

Question

Assertion: F - F bond has low bond dissociation energy. Reason: The fluorine has lower reactivity. (A) If both assertion and reason are true and reason is a correct explanation of the assertion (B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion (C) If the assertion is true but the reason is false (D) If both the assertion and reason are false

Tardigrade Admin · Accepted Answer

Lower value of bond dissociation energy of fluorine is due to the high inter electronic repulsions between nonbonding electrons of the

2 p

-orbital of small sized fluorine. As a result

F - F

bond is weaker as comparison to

Cl - Cl

and

B r - B r

bonds.

Bond dissociation energy

F - F 38 Kc a l / m o l e

Cl - Cl 57 K c a l / m o l e

B r - B r 45.5 Kc a l / m o l e

I - I, 35.6 K c a l / m o l e

Q. Assertion : F - F bond has low bond dissociation energy. Reason : The fluorine has lower reactivity.

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

If both the assertion and reason are true but the reason is not a correct explanation of the assertion

If the assertion is true but the reason is false

If both the assertion and reason are false

Q. Assertion : F - F bond has low bond dissociation energy.
Reason : The fluorine has lower reactivity.