Kc And Kp Relationship and Characteristics of K Quiz Online Practice Test

1. For the reaction PCl₅ ⇌ PCl₃ + Cl₂ at 25°C, if the equilibrium constant K_c  is 26, what is the value of K_p?

2. For which of these reactions does the equilibrium constant  K_p fall below K_c?

3. When 2 moles of PCl₅ are heated to 400°C in a 2-liter closed vessel, and 40% of PCl₅ dissociates into PCl₃ and Cl₂ at equilibrium, what is the value of K_c?

4. Which of the following statements is incorrect?

5. If the concentration quotient (Q) is less than the equilibrium constant (K), what will happen to the reaction?

6. For a reaction in equilibrium, where Kp and Kc are the equilibrium constants in terms of partial pressure and concentration respectively, how are they related?

7. In an equilibrium reaction, which of the following conditions holds true?

8. In the context of the law of mass action, "active mass" refers to:

9. At any given temperature, the mass of a gas dissolved in a solvent is directly proportional to:

10. Which scenario exemplifies solid-solution equilibrium?

11. For the equilibrium reaction 2 A (g) ⇌ 2 B (g) + C (g), if the equilibrium constant (Kc) at 1000 K is 4 × 10⁻⁴, what would be the value of Kp at 800 K?

12. For the reaction 2A ⇌ B + C, where the equilibrium constant (K_c) is 2 × 10⁻³, and the concentrations at a given moment are [A] = [B] = [C] = 3 × 10⁻³ M, which of the following statements is accurate?

13. Given the following reactions and their equilibrium constants:

N₂ + O₂ ⇌ 2NO with K₁2NO + O₂ ⇌ 2NO₂ with K₂NO₂ ⇌ 1/2 N₂ + O₂ with K₃What is the expression for K3 in terms of K1 and K2?

14. For a reversible reaction with equilibrium constants Kf (for the forward reaction) and Kb (for the backward reaction), which of the following statements is true?

15. For the equilibrium reaction N_2(g) + 3H_2(g) ⇌ 2NH_3(g), what happens to the number of molecules of each component when the pressure is increased while keeping the temperature constant?

16. When the equilibrium constant K_c is large, it indicates that the concentration of the __________ is high, while the concentration of the __________ is low.

17. In the expression for the equilibrium constant K_c, what do the square brackets denote?

18. For the equilibrium reaction C + H₂O ⇌ CO + H₂ with an equilibrium constant Kc of 1.6 × 10^-21, where does the equilibrium position lie?

19. When the equilibrium constant (K) is significantly greater than one (K >> 1), what does this indicate about the position of equilibrium?

20. Given the equilibrium reaction

2SO_3(g) ↔ 2SO_2(g) + O_2(g)with an equilibrium constant Kc of 4.08 × 10^-3 at 1000 K, what is the value of K_p?