Question

Assertion :For reaction $N_2\left(g\right)+3H_2\left(g\right)\rightleftharpoons 2{NH}_3\left(g\right)$ Unit of $K_C=L^2{mol}^{-2}$ Reason: For the reaction $N_2\left(g\right)+3H_2\left(g\right)\rightleftharpoons 2{NH}_3\left(g\right)$, Equilibrium constant $K_C=\frac{{\left[{NH}_3\right]}^2}{\left[N_2\right]{\left[H_2\right]}^3}$

• 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

For the reaction, $K_c=\frac{{\left[{NH}_3\right]}^2}{\left[N_2\right]{\left[H_2\right]}^3}$

$K_c=\frac{{mole}^2\times L\times L^3}{L^2\times mol\times {mol}^3}=L^2{mol}^{-2}$

So, the units for $K_c$ are $L^2{mol}^{-2}$

The assertion and reason, both are true and reason is correct explanation of assertion.

Hence, option $A$ is correct.