CHM 101 TYPE B CBT PRACTICE TEST

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

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

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

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

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

6. Order of a given reaction can only be determined

7. 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?

8. 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?

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

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

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

Mg =24.31

N= 14.01

O= 16

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

13. Water is best described as

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

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

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

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

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

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

20. A zeroth order reaction is one whose

21. Gamma radiation can be described as

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

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

24. The pH of pure water is

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

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

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

28. Photolytic reactions take place in the presence of

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

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

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

32. Rate of a reaction is measured in

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

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

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

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

37. A saturated solution is defined as

38. Catalyst speeds up the rate of

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

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