Question

Assertion :The bond angle of $P{Br}_3$ is greater than ${PH}_3$ but the bond angle of $N{Br}_3$ is lesser than ${NH}_3$. Reason: Electronegativity of $P$-atom is less than that of $N$-atom.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect but Reason is correct

Answer 1

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

In $PB{r}_3$ bond angle is $107$.

In $P{H}_3$ bond angle is $103$.

$PB{r}_3$ bond angle is greater than $P{H}_3$.

$NB{r}_3$ bond angle is less than $N{H}_3$

Electronegativity of $P$-atom (2.19) is less than that of $N$-atom (3).

Assertion and Reason are correct but Reason is not the correct explanation or assertion.

So answer is B.