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Polarity and Dipole Moments

Assertion :Bo...

Question

Assertion :Bond dissociation energy of $F_{2}$ is smaller than that of ${C l}_{2}$ . Reason: Bond dissociation energy is in order $F_{2} < {C l}_{2} < {B r}_{2} < I_{2}$ .

A

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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B

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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C

Assertion is correct but Reason is incorrect

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D

Assertion is incorrect but Reason is correct

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Solution

The correct option is C Assertion is correct but Reason is incorrect
Bond dissociation energy of fluorine is however, lower than chlorine and bromine due to its small size its inter electronic repulsion is very high

Bond dissociation energy of fluorine is 38 kcal/mol which is smaller than that of chlorine which is 57 kcal/mol.
Bond dissociation energy is in order $I_{2} < F_{2} < {B r}_{2} < {C l}_{2}$
Thus, assertion is correct but Reason is incorrect.

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