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MDCAT XI Chemistry Chemical Kinetics Online Test-2

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MDCAT XI Chemistry Chemical Kinetics Online Test-2

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📚 Test Details

  • Subject: Chemistry
  • Class: 1st year / XI
  • Chapter: Chemical Kinetics
  • Test: 2
  • Book: Sindh Textbook
  • Total No. Of MCQs: 50 MCQs
  • Time Allowed: 50 Minutes
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  • Price: Free

1 / 50

1. The rate of a chemical reaction tells us about:

2 / 50

2. Which of the following observations is incorrect about the order of a reaction?

3 / 50

3. The rate constant of a zero-order reaction has the unit:

4 / 50

4. For the reaction:
2A + B → A₂B
If the concentration of A is doubled and that of B is halved, then the rate of the reaction will:

5 / 50

5. When the rate of the reaction is equal to the rate constant, the order of the reaction is:

6 / 50

6. In the Haber process for the manufacture of ammonia, the following catalyst is used:

7 / 50

7. A catalyst alters which of the following in a chemical reaction?

8 / 50

8. The reaction NO₂ + CO → NO + CO₂ takes place in two steps. Find the rate law:
Step 1: 2NO₂ → NO + NO₃ (k₁) – slow
Step 2: NO₃ + CO → CO₂ + NO₂ (k₂) – fast

9 / 50

9. Hassan performs the reaction:
X + H₂O → product.
Find the rate of reaction if the value of X is 2 M and k is 4.

10 / 50

10. What is the rate law for the acid hydrolysis of an ester such as CH₃COOC₂H₅ in aqueous solution?

11 / 50

11. When light strikes on Cs metal and it ejects electrons to become positively charged, the order of its reaction is:

12 / 50

12. Catalyst which enhances reactant activity used in the decomposition of H₂O₂ to H₂ and I₂:

13 / 50

13. Mazhar performs an experiment on a reaction in which H₂O reacts with H₂O and ionization occurs. The order of the reaction is:

14 / 50

14. Thermo-decomposition of N₂O₅ is:
2N₂O₅(g) ⟶ 2N₂O₄(g) + O₂(g)

15 / 50

15. With an increase of 10°C, the rate of reaction doubles. This increase in the rate of reaction is due to:

16 / 50

16. The reaction: 2A + B ⟶ C + D
The expression for the rate law is: rate = k [A]⁰ [B]
The order of reaction in A is:

17 / 50

17. The rate of an enzyme-catalyzed reaction is independent of:

18 / 50

18. Reactions with high activation energy are usually:

19 / 50

19. If CaCO₃ breaks into CaO and CO₂, and for supposition its activation energy is low, it means:

20 / 50

20. Activated complex:

21 / 50

21. Which of the following is an example of homogeneous catalysis?

22 / 50

22. A catalyst does not change the:

23 / 50

23. Order of reaction is strictly determined by the:

24 / 50

24. If X and Y are the enzymes performing reactions, the reactions will be ______ by enzymes:

25 / 50

25. Radioactivity of a radioactive metal is termed as:

26 / 50

26. Rate = k[A]²[B]

27 / 50

27. The rate of reaction increases with temperature due to:

28 / 50

28. When the rate of reaction is equal to the rate constant, the order of reaction is:

29 / 50

29. If the temperature is decreased from 100°C to 80°C, then the rate of reaction:

30 / 50

30. Oxidation of chloroform to phosgene gas:

31 / 50

31. Which of the following given values cannot be an order number?

32 / 50

32. The decomposition of H₂O₂ is decreased by:

33 / 50

33. In the reaction X ⟶ Y, the rate of appearance is written as:

34 / 50

34. A reaction proceeds in such a way that the order of reaction is independent of reactant concentration. The overall order of the reaction would be:

35 / 50

35. The unit of k is mol dm⁻³ s⁻¹. The order of reaction is:

36 / 50

36. The rate constant k of a reaction is affected by:

37 / 50

37. Which of the following is an example of acid catalysis?

38 / 50

38. Initial rate of reaction is slow; as soon as the product is formed, the rate of reaction increases.

39 / 50

39. For a fast reaction:

40 / 50

40. Which of the following factors affects the rate of a chemical reaction?

41 / 50

41. What is the study of reaction rates and reaction mechanisms called?

42 / 50

42. Which of the following is NOT a factor that affects reaction rate?

43 / 50

43. For a zero-order reaction, the rate of reaction is:

44 / 50

44. Rate of reaction generally:

45 / 50

45. Greater the concentration of reactant, __________.

46 / 50

46. Activated complex is formed due to:

47 / 50

47. Rate of reaction when the concentrations of reactants are taken as unity is called:

48 / 50

48. Sum of exponents of molar concentrations is called:

49 / 50

49. Energy of activation for the backward reaction is less than the forward reaction for a __________ reaction.

50 / 50

50. When the reaction completes in more than one step, the rate of reaction will be determined by:

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