Assertion: In NH3, N is sp3 hybridised, but angle is found to be 107°. Reason: The decrease in bond angle is due to repulsion between the lone pair - bond pair.

Question

Assertion: In NH3, N is sp3 hybridised, but angle is found to be 107°. Reason: The decrease in bond angle is due to repulsion between the lone pair - bond pair. (A) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion. (B) If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion. (C) If the Assertion is correct but Reason is incorrect. (D) If the Assertion is incorrect and Reason is correct.

Tardigrade Admin · Accepted Answer

Both assertion and reason are true and reason is the correct explanation of assertion.
lone pair - lone pair repulsion

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lone pair - bond pair repulsion

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bond pair - bond pair repulsion. In the ammonia molecule,

N H_{3}

there are three bond pairs and one lone pair. The three

N - H

bond pairs are pushed closer because of the lone pair - bond pair repulsion, and

H N H

bond angle gets reduced from

10 9^{\circ} 2 3^{'}

(the tetrahedral angle) to

10 7^{\circ}

.

Q. Assertion : In NH3​,N is sp3​ hybridised, but angle is found to be 107∘. Reason : The decrease in bond angle is due to repulsion between the lone pair - bond pair.

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

If the Assertion is correct but Reason is incorrect.

If the Assertion is incorrect and Reason is correct.

Q. Assertion : In $N H_{3}, N$ is $s p_{3}$ hybridised, but angle is found to be $10 7^{\circ}$ .
Reason : The decrease in bond angle is due to repulsion between the lone pair - bond pair.