Equilibrium in Physical and Chemical Processes — Prelims Questions

For the reaction $\text{N}_2(g) + 3\text{H}_2(g) \rightleftharpoons 2\text{NH}_3(g)$, the value of $K_p$ is $4.1 \times 10^{-4}$ at $400^\circ\text{C}$. Calculate the value of $K_c$ for this reaction at the same temperature. (Given: $R = 0.0821\,\text{L atm mol}^{-1}\text{K}^{-1}$)

Which of the following statements is TRUE regarding a system at chemical equilibrium?

For which of the following reactions is $K_p = K_c$?

Which of the following is an example of heterogeneous equilibrium?

Which of the following statements about physical equilibrium is INCORRECT?

At $25^\circ\text{C}$, the equilibrium constant $K_c$ for the reaction $\text{N}_2\text{O}_4(g) \rightleftharpoons 2\text{NO}_2(g)$ is $0.125\,\text{M}$. If the equilibrium concentration of $\text{N}_2\text{O}_4$ is $0.050\,\text{M}$, what is the equilibrium concentration of $\text{NO}_2$?