Question

Assertion :Although $P{F}_5,PC{l}_5$ and $PB{r}_5$ are known, the pentahalide of nitrogen has not been observed. Reason: Phosphorus has lower electronegativity than nitrogen.

• 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

Although $P{F}_5,PC{l}_5$ and $PB{r}_5$ are known, the pentahalide of nitrogen has not been observed. $PC{l}_5$ has $s{p}^{3}d$ hybridization. $d-$ orbitals are not available in nitrogen due to which it cannot expand its valency. Phosphorus has lower electronegativity than nitrogen. Hence, both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.