Question

Assertion :Equivalent weight of $N{H}_3$ in the reaction , $N_2\to N{H}_3$ is 17/3 while that of $N_2$ is 28/6. Reason: Equivalent weight $=\frac{\text{Molecular weight}}{\text{Number of electrons lost or gained per molecule}}$

• 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. Both Assertion and Reason are incorrect

Answer 1

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

During the reaction, the oxidation number of nitrogen decreases from 0 to $-3$. Since, there are two N atoms, the total change in oxidation number is 6. Thus 6 electrons are transferred.
Equivalent weight of $N{H}_3=\frac{17}{3}$

Equivalent weight of $N_2=\frac{14\times 2}{6}=\frac{28}{6}$

Hence, option A is correct.