CHM 101 TYPE B CBT PRACTICE TEST

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

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

3. The pH of pure water is

4. Gamma radiation can be described as

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

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

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

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

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

10. Catalyst speeds up the rate of

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

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

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

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

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

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

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

Mg =24.31

N= 14.01

O= 16

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

19. Order of a given reaction can only be determined

20. Rate of a reaction is measured in

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

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

23. Photolytic reactions take place in the presence of

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

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

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

27. A saturated solution is defined as

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

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

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

31. 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?

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

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

34. A zeroth order reaction is one whose

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

36. Water is best described as

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

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

39. 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?

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