CHM 101 TYPE B CBT PRACTICE TEST

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

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

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

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

5. A zeroth order reaction is one whose

6. Order of a given reaction can only be determined

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

8. Catalyst speeds up the rate of

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

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

Mg =24.31

N= 14.01

O= 16

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

12. Water is best described as

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

14. The pH of pure water is

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

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

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

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

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

20. 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?

21. Photolytic reactions take place in the presence of

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

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

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

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

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

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

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

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

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

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

32. 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?

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

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

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

36. Gamma radiation can be described as

37. Rate of a reaction is measured in

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

39. A saturated solution is defined as

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