Take your time to read instructions before taking this test.

There are 40 questions which you are to answer in 15 minutes that gives you roughly 30 seconds per question.

If you can get at least 60%, you can be rest assured that you’ll ace CHM 101 exam

PS

In a normal exam you will be asked between 40 – 60 questions but I only arranged 40 questions

Note

  • Do not be in a hurry to answer the questions
  • Do not waste time on a question you don’t know
  • Move as fast as possible and starting with questions that don’t have calculation first to save time
  • Always crosscheck
  • Don’t be in a hurry to submit, you are not in a competition
  • Don’t be scared. Getting an A is easy
  • Don’t be over confident, you can end up a D, E or F. Calm your blood, no be only you sabi book

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70 – 100 A

60 – 69 B

50 – 59 C

45 – 49 D

40 – 44 E

0 – 39 F

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CHM 101 TYPE B

1 / 40

1. What is the pH of a neutral solution at 25 0C?

2 / 40

2. Photolytic reactions take place in the presence of

3 / 40

3. Substances that dissolve in water to release hydroxonium ion is known as

4 / 40

4. To balance a redox reaction in basic medium, 𝐻2𝑂 is added to the side with

5 / 40

5. The change in the concentration of reactant or product per unit time is known as

6 / 40

6. The half-life of a first order reaction depends on

7 / 40

7. The unit of rate constant, K, in a first order reaction is

8 / 40

8. Rate of a reaction is measured in

9 / 40

9. The pH of pure water is

10 / 40

10. A substance that ionizes in solution to produce hydroxyl ion is

11 / 40

11. The unit of rate constant, K, in a first order reaction is

12 / 40

12. Order of a given reaction can only be determined

13 / 40

13. Gamma radiation can be described as

14 / 40

14. What is the identity of the element with 6 protons, 7 Neutrons and 6 electrons

15 / 40

15. An expression which shows how a reaction is related to concentration is termed

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16. What is the minimum energy barrier that must be overcomed for a chemical reaction to occur

17 / 40

17. The rate of a reaction is directly proportional to the concentration of reactants. This is referred to as

18 / 40

18. Catalyst speeds up the rate of

19 / 40

19. What is the pH of a basic solution whose hydroxyl ion concentration is 0.00001M?

20 / 40

20. A reaction in which the same substance on the reactant side is being oxidized and reduced simultaneously is known as

21 / 40

21. Ozone is unstable, decomposing to oxygen, as shown in the balanced equation 2O2 ➡ 3O2. In this reaction, how many grams of oxygen can be formed from the decomposition of 96g of ozone?

22 / 40

22. Water is best described as

23 / 40

23. The half-life of a first order reaction depends on

24 / 40

24. The powers to which the concentration of each reactant is raised to give a correct dependence of rate on concentration is termed

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25. The shifting of the equilibrium position to annul the effect of changes to re-establish equilibrium is termed

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26. Does temperature changes affect the equilibrium constant of a reaction?

27 / 40

27. Catalyst ................... the rate of reaction by ................... the activation energy

28 / 40

28. The sum of all exponents of the reactants as contained in the experimentally determined rate law is known as

29 / 40

29. According to history, the concept that all matter is composed of atom was first proposed by

30 / 40

30. A saturated solution is defined as

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31. Which of the following is not used to describe the condition of a gas?

32 / 40

32. A zeroth order reaction is one whose

33 / 40

33. What mass of HNO3(63g/mol) is contained in 300ml of 0.30 M HNO3 solution!

34 / 40

34. Which cell involves a non-spontaneous redox reaction?

35 / 40

35. Using the method of initial rates for the reaction A➡B, if the initial concentration of A is doubled and the rate of reaction quadruples, what is the order of reaction with respect to A?

36 / 40

36. What is the oxidation number of the chromium atom in K2Cr2O4?

37 / 40

37. An element that has the valence electronic configuration 3s2 3p3 belongs to which period and group?

38 / 40

38. Calculate the percentage composition of Nitrogen in Magnesium Nitrate Mg(No3)2

Mg =24.31

N= 14.01

O= 16

39 / 40

39. The number of molecules/ions of the reactants present in the balanced stoichiometric equation is referred to as:

40 / 40

40. What symbol is used to express the facor,10^-6?

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