Question

Assertion : The covalence of nitrogen in $N_2O_5$ is $5$
Reason : Nitrogen can expand its covalence beyond $4$.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (D)

Structure of $N_2O_5$ is

Hence, it forms $4$ covalent bonds with oxygen. It cannot expand its covalence beyond $4$ due to the non-availability of $d$-orbital.