Question

Assertion: $N{O}_3^{-}$ is planar while $N{H}_3$ is pyramidal.
Reason: $N$ in $N{O}_3^{-}$ is $s{p}^2$ and in $N{H}^3$ is $s{p}^3$ hybridized.

• A. If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion
• B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion
• C. If Assertion is true but the Reason is false
• D. If both Assertion and Reason are false

Answer 1

Answer: (A)

Hybridisation is $s{p}^2$ here and therefore planar structure is expected.

$N{H}^3:1s^2,2s^2,2p^3$

Hybridisation is $s{p}^3$ , therefore tetrahedral structure is expected but there is pyramical structure as lone pair of electron occupy one of the corners of tetrahedral.