CGPET 2021 Solved Paper

Relation between $K_p$ and $K_C$ is as folows $K_p K_C(RT)^{\Delta n}$ where, $K_p =$ equilibrium constant when concentrations at equilibrium are expressed in atmospheric pressure. $K_C =$ equilibrium constant when concentrations at equilibrium are expressed in molarity. $R =$ gas constant $T =$ temperature $\Delta n =$ the changed in number of moles of gas molecules. $[\Delta n =$ number of gaseous moles in product- number of gaseous moles in reactant] For reaction, $\mathrm{N}_2(g) + 3\,\mathrm{H}_2(g) \rightleftharpoons 2\,\mathrm{NH}_3(g) + \text{Heat}$ $K_p = K_C(RT)^{2-(1+3)}$ $K_p = K_C(RT)^{-2}$ Hence, correct answer is (c).