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CHEMISTRY4TH Periodical Test

Name __________________________ Yr & Sec. _____________________ Score _______

Test I. Multiple Choice: Select the choice that best answers each question or completes each statement.

1. The study of the composition of matter and the changes that matter undergo is.a. chemistry b. physics c. biology d. meteorology

2. Increased levels of carbon dioxide in the atmosphere can cause.a. smog b. acid rain c. global warming d. ozone depletion

3. The greatest source of energy on Earth isa. petroleum b. sunlight c. electricity d. nuclear power

4. The branch of chemistry that studies most carbon-containing substance isa. physical b. inorganic c. analytical d. organic

5. Which element is paired with the wrong symbol?a. sulfur, S b. potassium, P c. nitrogen, N d. silicon, Si

6. Which phrase best describe the sea water?a. heterogeneous mixture b. homogenous compound c. heterogeneous substanced. homogeneous mixture.

7. The state of matter characterized by a definite volume and definite shape is ana. solid b. mixture c. liquid d. gas

8. Which of the following is not a chemical change?a. paper being shredded b. steel rusting c. charcoal burning d. a newspaper yellowing in a sun.

9. Which of the following properties could not be used to distinguish between table salt and table sugar?a. boiling point b. melting point c. density d. color

10. Which of these measurements have four significant figures?a. 3.0450 g b. 0.0450 g c. 3.0 x 10 4 g d. 4.050 g

11. Chemistry is primarily concerned with the composition of and changes in.a. earth b. nature c .matter d. man

12. A statement which is a possible solution to a problem is aa. hypothesis b. observation c. experimentation d. theory

13. Which of the following substances is an element?a. salt b. sugar c. carbon d. air

14. A black, crystalline solid forms a purple vapor when it is heated. The solid isa. iodine b. copper (II) sulfate c. sulfur d. phosphorus

15. The number of significant figures in 540 000 isa. 3 b. 2 c. 5 d. 4

16. Convert 30C to F.

a. -1.11 b. 271.89 c. 359 d. 8617. Convert -10 F to C.

a. -23.3 b. 249.6 c. 14 d. -25918. Which of the following units of measure is equivalent to cm 3?

a. cm b. mm c. ml d. mg19. If 2 ml of a liquid weights 4g, its density is

a. 0.5 g/ml b. 1 g/ml c. 2 g/ml d. 4 g/ml20. If the density of a substance is 8 g/ml, what volume would 40 g of substance occupy?

a. 0.2 ml b. 5 ml c. 32 ml d. 320 ml21. The process of spreading out spontaneously to uniformly occupy a space is known as

a. diffusion b. pressure c. compressibility d. expansion

22. Which of the following is not a basic assumption of the kinetic theory?a. Gases consist of molecules in constant motion in straight-line paths. b. The temperature of a gas is proportional to the average kinetic energy of the molecules.c. The collisions between gas molecules and with the walls of the container are perfectly elastic.d. Since the collisions of molecules are perfectly elastic, there is a strong attractive force between

molecules in the gaseous state.23. If the volume of one mole of gas molecules remains constant, lowering the temperature will make

the pressure. a. increase b. decrease c. increase then decrease d. decrease then increase24. If the volume available to the gas in increased, the pressure exerted by one mole of gas molecules will

a. increase b. decrease c. increase then decrease d. decrease then increase25. To what Celsius temperature must 580 ml of oxygen at 17C be raised to increase its volume to 700 ml?

a. 77C b. 350C c. 240C d. 20.5C

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26. Which of the following illustrate the mathematical statement of Charless law?a. P 1V1 = P 2V2 b. V 1/T1 = V2/T2 c. P T = P 1 + P 2 + P 3 + .. d. V 1P1/T1 = V 2P2/T2

27. Which one of the following does not signify normal atmospheric pressurea. 760 mm Hg b. 760 torr c. 2 atm d. 76 cm Hg

28. What happens to the volume of a confined gas if its pressure is doubled and its temperature remainsconstant?a. volume will increase b. volume will decrease c. volume will remain the same d. all of the above29. Given the equation P 1V1/T1 = P2V2/T2, which of the following is the formula for final temperature

a. T 2 = P 2/P1 x V 2/V 1 x T 1 b. T 2 = P 1/P2 x V2/V1 x T 1c. T 2=P1/P2 x V 1/V 2 x T 1 d. T 2= T 1/P1 x V 1/P2 x V 2

30. What pressure must be applied to 225 ml of gas at 1 atm to reduce its volume to 100 ml?a. 0.44 atm b. 2.25 atm c. 22,500 atm d. 1,710 atm

31. Why does the pressure build up in a tire on a hot day? (Assume that tire volume is constant)a. as temperature increases, kinetic energy increases

b. as temperature increases, kinetic energy decreases.c. as temperature increases, pressure also increasesd. Both a and c.

32. A 2.5 litre sample of dry air in a cylinder exerts a pressure of 3.00 atm at 25.C, Without changing

the temperature, a piston is moved until the pressure in the cylinder is reduced to 1.00 atm. What is thefinal volume of the gas?

a. 7.50 L a. 15.0 L c. 7.00 L d. 20.0L33. Which of the following statements about the kinetic theory of gases is false.

a. gases move faster at high temperature b. gas particle move at high speeds.c. there is a strong attractive force between gas molecules.d. particles of a gas move rapidly in all direction.

34. Which of the following properties does not describe a gas?a. pressure b. volume c. temperature d. ductility

35. Which of the following statement does not describe the pressure of a gas?

a. the volume of a container b. 3.00 atm c. 750 torr d. the number of gas particles36. Which of the following indicates the amount of gas particles?

a. 4.00 moles He b. 350 K c. 10.0 L d. 1,500 torr 37. The helium gas in a balloon has a pressure of 735 mm Hg. Which of the following units of pressure iscorrect? a. 0.967 b. 760 torr c. 735 cm d. 1.03 atm38. How many moles of O 2 are present in 44.8 L of O 2 at STP?

a. 1.2 moles b. 1.4 moles c. 2.0 moles d. 2.8 moles39. How many moles of CO 2 are present in 4.00 L of CO 2 gas at STP?l

a. 0.179 mole b. 0.125 mole c. 5.6 moles d. 8.0 moles40. What volume in litres is occupied by 2.5 moles N 2 at STP?

a. 0.11 L b.11.2 L c. 56 L d. 70 L

41. Which of the following is a mixture?a. lead b. brass c. sodium chloride d. charcoal

42. Which of the following is not a compound?a. acetic acid b. alcohol c. magnesium d. zinc oxide

43. Metals are good conductors of heat and electricity. This property is not exhibited bya. chromium b. tungsten c. aluminum d. sulfur

45. Which substances is dense, shiny, and malleable?a. gold b. charcoal c. arsenic d. boron

46. Which of the following is a chemical change?a. freezing of water b. sawing a board in half c. breaking a glass d. fermenting grapes

47. Which of the following is a nonmetal?

a. potassium b. phosphorus c. manganese d. magnesium48. An element which conducts heat and electricity isa. carbon b. chlorine c. copper d. potassium

49. Examples of nonmetals area. K and Na b. Ca and Pb c. Sn and Zn d. S and I

50. The most reactive metals isa. Cu b. Au c. Ag d. Mg