MDCAT XI Chemistry Chemical Equilibrium Online Test

1. A large Kc value indicates that at equilibrium:

2. For H₂ + I₂ ⇌ 2HI, which condition increases HI yield?

3. In exothermic equilibrium, increasing temperature shifts the reaction toward:

4. Units of Kₚ vs. Kc differ due to:

5. Kc has no units when:

6. In NH₄OH + NH₄Cl buffer, adding NH₄Cl reduces OH⁻ due to:

7. For N₂ + 3H₂ ⇌ 2NH₃, equilibrium shifts right when:

8. Expression for 2A + B ⇌ 3C:

9. Which does  affect Kc?

10. When Q < Kc:

11. Buffer action works due to:

12. A large Kc means reaction favors:

13. Solubility of Ca(OH)₂  decreases with:

14. Not a reversible reaction property:

15. In N₂ + 3H₂ ⇌ 2NH₃, adding N₂ shifts reaction move

16. Law of Mass Action by:

17. Kₚ falls with rising T in which exothermic equilibrium?

18. Dynamic equilibrium:

Dynamic equilibrium:

19. Q gives:

20. Catalyst:

21. Kc units for H₂ + I₂ ⇌ 2HI:

22. Equal moles both sides → Kc units:

23. C ⇌ A + B; Kc increase if temperature increases then reaction is:

24. Which reaction doesn’t reach equilibrium?

25. If Q > Kc, reaction shifts:

26. Weak acid ionization constant:

27. Acid strength best shown by:

28. By  reducing pressure  reaction moves to

29. Kp = Kc(RT)^Δn applies to:

30. IN ENDOTHERMIC REACTION IF TEMPERATURE IS INCREASED THEN REACTION SHIFT TO

31. Kc units for PCl₃ + Cl₂ ⇌ PCl₅:

32. At equilibrium:

33. Inert gas at constant pressure:

34. Strong acid added to buffer:

35. Catalyst effect:

36. At equilibrium, the rate of the forward reaction is:

37. Which of the following is NOT a characteristic of a chemical equilibrium?

38. Remove heat from exothermic reaction shift equilibrium

39. For Δn in Kp = Kc(RT)^Δn, 2A ⇌ 3B:

40. If Q < K, reaction proceeds:

41. Chemical equilibrium can be established only in:

42. When a reversible reaction reaches equilibrium, the concentrations of reactants and products become:

43. Which factor does NOT affect the equilibrium position of a reaction?

44. According to Le Chatelier’s Principle, if the concentration of a reactant is increased, the equilibrium will shift:

45. If heat is added to an endothermic reaction at equilibrium, the reaction will shift:

46. The equilibrium constant (Kc) is affected only by:

47. Which of the following will shift the equilibrium to the product side in an exothermic reaction?

48. In a gaseous equilibrium, increasing pressure favors the side:

49. If the equilibrium constant Kc >> 1, it means:

50. At equilibrium, the concentration of reactants and products depends on: