• # question_answer 65) If ${{K}_{p}}$ for a reaction ${{A}_{(g)}}+2{{B}_{(g)}}3{{C}_{(g)}}+{{D}_{(g)}}$ is $0.05$ atm at $1000K.$ Its ${{K}_{C}},$ in terms of R will be A)  $20000\text{ }R$                  B)  $0.02\text{ }R$C)  $5\times {{10}^{-5}}\,R$              D)  $\frac{5\times {{10}^{-5}}}{R}$

${{\Delta }_{ng}}=4-3=1$ ${{K}_{p}}={{K}_{C}}\,{{(RT)}^{\Delta n}}$ $0.05={{K}_{C}}\,(1000\,R)$                 or            ${{K}_{C}}\,\frac{5\times {{10}^{-5}}}{R}$