MDCAT Chemistry Chemical Equilibrium Test Online

1. In an exothermic reversible reaction increase in temp shifts the equilibrium to

2. Which of the following factors will favour the reverse reaction in a chemical equilibrium?

3. Which set of solutes will form a buffer when dissolved in water to make 1 litter of solution?

4. What is the relationship between kp and kc?

5. If the value of kc is very low then the forward reaction will occur __________

6. Two moles of HI was heated in a sealed tube at 440°C till the equilibrium was reached. HI was found to be 22% decomposed. The equilibrium constant for dissociation is

7. Which one of the following is a buffer solution?

8. If a buffer solution of higher PH than seven is to be made we use

9. The product of [0H¯][H⁺] at 25C° is

10. Which of the following aqeous solution will be basic?

11. By the addition of base in water pH will be

12. In an exothermic reaction, a 10° rise in temperature will

13. The state of equilibrium refers to

14. When pressure is applied to the equilibrium system Ice ⇌ Water? Which of the following phenomenon will happen?

15. Solubility of any salt can be determined from

16. In reversible reactions, if the forward reaction occur very fast then reactant (s) is (are) __________

17. Chemical equilibrium is referred to as dynamic because, at equilibrium, the

18. The factor which changes equilibrium constant o the reaction A₂(g) + B₂(g) → 2 AB(g) is

19. The relationship between Kp and Kc is give by

20. Reaction which proceed in both the directions is called

21. Le-Chatelier’s principle is sometime known as

22. The rate at which a substance reacts is directly proportional to its active mass and the rate of reaction is directly proportional to the product of the active mass of reacting substances is known as

23. The rate of chemical reaction is directly proportional to the active mass of reactant this statement is known as ___________

24. pH of milk is

25. The equilibrium constant in a reversible chemical reaction at a given temperature

26. A basic Buffer solution can be prepared by mixing

27. When ever a week a base is dissolved in water, it gives its conjugate acid similarly a weal acid in water products its conjugate base. The conjugate acid base pair is stated by

28. In a chemical reaction N₂ + 3H₂ ⇌ 2NH₃ at equilibrium point

29. Preparation of buffer solution can be done by mixing

30. An equilibrium constant of 10¯⁴ for a reaction means that the reaction is

31. When pressure is applied to the given equilibrium ice water which of the following will happen

32. Which statements are correct for a reaction at equilibrium?
(I) The forward and reverse reactions both continue
(II) The rates of the forward and reverse reactions are equal
(III) The concentrations of reactants and products are equal

33. When H₂ and I₂ are mixed and equilibrium is attained, then

34. If rate of concentration of reaction is equal to rate of concentration of products in reversible reaction the __________

35. When rate of forward reaction is equal to rate of backward reaction, then the equilibrium established is called

36. Which of the following is more acidic?

37. When sparingly soluble salt is in equilibrium with molar concentration of its oppositely charged ion when the product is called

38. Which of the following gives a basic buffer?

39. Which pH is considered as basic?

40. For a reaction H₂ + I₂ ⇌ 2HI at 721 K, the value of equilibrium constant is 50. If 0.5 moles each of H₂ and I₂ is added to the system the value of equilibrium constant will be

41. At start of reaction, concentration of reactants are on

42. For equilibrium 2NO₂(g) ⇌ N₂O₄(g) + 14.6 kcal increase of temperature would

43. In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled then the equilibrium constant will

44. Temperature for preparation of SO₃ is

45. Who studied the effect of temperature on equilibrium?

46. Units of Kc is

47. Conjugate base of a very weak acid is

48. Water and ice are in equilibrium at 0C° and pressure is applied at this stage, then

49. Idea of PH and POH was put forward by

50. A buffer solution can be prepared by mixing

51. In which of the following cases, the reaction goes farthest to completion?

52. A chemical reaction A ⇌ B is said to be in equilibrium when

53. Synthesis of ammonia by Habor process is an example of ___________

54. Addition of CH3COOH and CH3COONa gives in water

55. The reaction 2SO₂ + 2O₂ ⇌ 2SO will be favoured by

56. In reversible reaction the changes in forward and backward reaction occur _________

57. At certain temperature, 50% of HI is dissociated into H₂ and I₂ the equilibrium constant is

58. The equilibrium will shift towards right by increasing ___________ of reactants

59. PH of human blood is

60. What can affect the magnitude of equilibrium constant Kp of a reversible gaseous reaction

61. Kc > Products / Reactants favours

62. AgCl dissolved with cone (2 x 10¯²) Ksp will be

63. For the reaction 2A(g) + B(g) ⇌ 3C(g) + D(g) two moles each of A and B were taken into a flask. The following must always be true when the system attained equilibrium