Question

Assertion: $NO_3^-$ is planar while $NH_3$ is pyramidal.
Reason: $N$ in $NO_3^-$ is $sp^2$ and in $NH^3$ is $sp^3$ 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 $sp^2$ here and therefore planar structure is expected.

$NH^3 : 1s^2 , 2s^2 , 2p^3$

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