Question

Assertion :Equivalent mass of $N_2{H}_4$ is 8 in acidic medium or basic medium Reason: It is oxidised to $N_2$ with loss of four electron per $N_2{H}_4$ unit

• 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 and Reason both are incorrect

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

Inbasic or acidic medium $KMn{O}_4$ can oxidize hydrazine, $N_2{H}_4$ to $N_2$ and $H_{2}O$.

N is changing oxidation state from $-2$ to zero

So, total loss in electron is 4 for 2 N - atom.

Equivalent mass $=\frac{Mw}{4}=\frac{32}{4}=8$.