Question

Assertion: $P{H}_3$ is more basic than $N{H}_3$
Reason: EN of N is more than that of P

• A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
• B. Both Assertion and Reason are true and Reason is not the correct explanation of Assertion
• C. The Assertion is true and Reason is false
• D. Assertion is false but Reason is true

Answer 1

The correct option is D Assertion is false but Reason is true

Basicity is proportional to the electron density of that compound or element. If the electron density is high, it will donate the pair of electron easily, hence it acts as better base.

In $N{H}_3$ and $P{H}_3$ as $N$ is smaller than $P$ so electron density of $N$ is higher. Hence $N{H}_3$ is more basic.

EN of $N$ is greater than $P$ which can be clear from periodic trends.