Question:
For the reaction
$\mathrm{Fe}_{2} \mathrm{~N}(\mathrm{~s})+\frac{3}{2} \mathrm{H}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{Fe}(\mathrm{s})+\mathrm{NH}_{3}(\mathrm{~g})$
Correct Option: , 3
Solution:
$K_{\mathrm{p}}=K_{\mathrm{C}}(\mathrm{RT})^{\Delta \mathrm{n}_{\mathrm{g}}}=K_{\mathrm{C}}(\mathrm{RT})^{1-3 / 2}=K_{\mathrm{C}}(\mathrm{RT})^{-1 / 2}$
$\Rightarrow K_{\mathrm{C}}=K_{\mathrm{p}}(\mathrm{RT})^{1 / 2}$