Science 10: Chemistry Unit Review

Name: _______________________Block: ________

1. Which of the following is an ionic compound?A. H2B. NH3C. CO32-

D. K2Cr2O7

Use the following Bohr model diagram to answer question 2.

2. Which of the following is represented by the diagram above?A. neon atomB. carbon ionC. magnesium ionD. magnesium atom

Use the following Bohr model diagram to answer question 3.

3. How many valence electrons are illustrated?A. 1 B. 7 C. 16 D. 17

4. How many unpaired electrons are present in a nitrogen atom?

A. 2 B. 3 C. 5 D. 7

Use the following Lewis diagram to answer questions 5 and 6.

X and Z represent unknown elements from the periodic table.

5. Which of the following is represented by X : X ?A. a noble gasB. an alkali metalC. a diatomic moleculeD. an alkaline earth metal

6. Which of the following products could be formed from the two molecules represented above?A. waterB. neon gasC. carbon dioxideD. hydrogen fluoride

7. How many lone pairs and bonding pairs of electrons surround the central oxygen atom in a Lewis diagram of water?

8. Coffee has a pH of 5. Which of the following shows the correct colour of each pH indicator when a small amount of black coffee is tested?

Use the following information to answer question 9.

A student is given four test tubes. He is asked to determine whether the substance in each test tube is acidic, basic or neutral. He makes the following observations:

9. Which of the following conclusions is supported by the observations?A. Test Tube 1 is basic.B. Test Tube 2 is neutral.C. Test Tube 3 is acidic.D. Test Tube 4 is acidic.

10. Which of the following is most likely to cause blue litmus paper to turn red?A. soapB. table saltC. lemon juiceD. oven cleaner

11. What is the name of the compound HCN?A. cyanous acidB. hydrocyanic acidC. hydrogen (I) cyanideD. hydrogen carbon nitride12. Which of the following is a representation for acetic acid?

A. I only B. I and II only C. I, III and IV only D. II, III and IV only

13. How many atoms of each of the following elements are present in thecompound copper(II) phosphate?

14. What is the name of the compound MnS2 ?A. manganese sulphideB. magnesium sulphideC. manganese(II) sulphideD. manganese(IV) sulphide

15. What is the chemical formula for dinitrogen pentoxide?A. NOB. N2O5C. N5O2D. N2O5

16. Which of the following is an inorganic compound?A. NO2B. C3H8C. C6H12O6D. CH3COOH

17. What is the coefficient needed in front of O2 in order to balance the following equation?

A. 1 B. 2 C. 3 D. 4

18. What type of reaction would be expected when sodium phosphate reacts with calcium chloride?A. synthesisB. combustionC. decompositionD. double replacement

19. Solid zinc reacts with sulphuric acid to produce hydrogen gas. What is the other product that would result from this reaction?

A. O2 B. H2S C. H2O D. ZnSO4

Use the following illustration showing the nucleus of an Rb-87 atom to answer question 20.

20. What process is illustrated above?A. a nuclear reaction producing a beta particleB. a nuclear reaction producing an alpha particleC. a chemical change producing a hydrogen atomD. a nuclear fusion reaction producing two new elements

21. Which of the following is a concern when nuclear energy is used to produce electricity?A. Nuclear waste material has a very short half-life.B. Nuclear energy does not produce a lot of electricity.C. An accident at a reactor could release a large amount of radioactivity.D. Radioactivity emitted during normal operation of a reactor can harm workers or those living nearby.

22. Which of the following reactions would produce a proton?

Use the following cartoon to answer question 23.

23. What element was formed during the first decay of the uranium-238?A. lead-206B. radium-226C. thorium-234D. uranium-234

24. Which subatomic particles are found in the nucleus of atoms?A only protons B. only electronsC. protons and neutrons D. protons and electrons

25. When forming ions, elements on the left side of the periodic table tend to behave in which of the following ways?A. lose protons B. gain protonsC. lose electrons D. gain electrons

26. What is the name of the reactive family of elements that form 1− ions?A. halogens B. noble gasesC. alkali metals D. alkaline earth metals

27. What is the atomic number of an atom with 19 protons, 19 electrons, and 21 neutrons?A. 19 B. 21C. 38 D. 39

28. Which of the following describes an ion of chlorine?A. 19 neutrons and 17 electronsB. 19 neutrons and 18 electronsC. 36 neutrons and 17 electronsD. 36 neutrons and 18 electrons

29. Which of the following is the correct name for Fe2(SO4)3?A. iron(II) sulfate B. iron(II) sulfideC. iron(III) sulfate D. iron(III) sulfide

30. Which of the following is the correct bond type and name for (NH4)2S?A. ionic, ammonium sulfideB. ionic, nitrogen hydrogen sulfideC. covalent, ammonium sulfideD. covalent, dinitrogen monohydrogen sulfide

31. What is the formula for diphosphorus pentachloride?A. PCl B. PCl5C. P2Cl5 D. P5Cl2

32. How many atoms of each of the following elements are present in nickel(III) sulfate?A. nickel = 2, sulfur = 3B. nickel = 1, sulfur = 1, oxygen = 4C. nickel = 3, sulfur = 1, oxygen = 4D. nickel = 2, sulfur = 3, oxygen = 12

33. What is the formula for manganese(II) chloride?A. MnCl B. MnCl2C. Mn2Cl D. MgCl2

34. List the total number of each type of atom found in the following reactants: 2FeCl3 + 3Na2CO3

A. IB. II C. IIID. IV

35. Which of the following is the correctly balanced equation for the following skeleton equation?

Al + ___ CuCl2 →___ AlCl3 + ___ CuA. Al + CuCl2 →AlCl3 + CuB. Al + 3CuCl2 →2AlCl3 + CuC. 2Al + 3CuCl2 →2AlCl3 + 3CuD. 6Al + 3CuCl2 →2AlCl3 + 6Cu

36. Which of the following equations is correctly balanced?A. Al + Br2 →AlBr3 B. Al + 3Br2 →AlBr3

C. Al + 3Br2 →2AlBr3 D. 2Al + 3Br2 →2AlBr3

37. Rewrite the following word equation as a balanced equation. Potassium sulfate and lead(II) nitrate react to make potassium nitrate and lead(II) sulfate.A. K2S + Pb(NO3)2 →2KNO3 + PbSB. K2SO4 + Pb(NO3)2 →2KNO3 + PbSO4

C. 3K2SO4 + Pb3N2 →2K3N + 3PbSO4

D. 3PSO4 + Pb3N2 →P3N + 3PbSO4

38. Write the skeleton equation for the following reaction. Iron(III) bromide reacts with sodium hydroxide to yield iron(III) hydroxide and sodium bromide.A. FeBr3 + NaOH →Fe(OH)3 + NaBrB. FeBr3 + SOH →Fe(OH)3 + SBrC. FeBr + NaOH →FeOH + NaBrD. IBr + NaOH →IOH + NaBr

39. Which of the following equations is correctly balanced?A. C5H12 + 8O2 →5CO2 + 6H2OB. C5H12 + 11O2 →5CO2 + 6H2OC. C5H12 + 11O2 →5CO2 + 12H2OD. 2C5H12 + 22O2 →10CO2 + 24H2O

40. You have a sample to test in a lab. The sample looks like milk. Choose the two best indicators for testing if the sample is in the same pH range as milk.A. litmus and phenolphthaleinB. methyl orange and methyl redC. methyl red and bromothymol blueD. phenolphthalein and indigo carmine

41. A solution has a pH of 11. Acid is added until pH = 5. Which indicator would be a good choice to know when the solution has reached pH = 5?A. methyl red B. methyl orangeC. phenolphthalein D. indigo carmine

42. A substance used in producing plastic is HCl. It is a(n) ___ and is named ___.A. salt, hydrogen chloriteB. acid, hydrogen chlorateC. base, hydrogen chlorideD. acid, hydrogen chloride

43. Perchloric acid is used in manufacturing explosives and speeding up chemical reactions. What is the formula for perchloric acid?A. HF B. HBrC. HClO4 D. H2Pe3

44. Which of the following correctly lists, in order, an acid, a base, and a salt?A. HCl, NaOH, BaCl2B. HNO3, CaCl2, NaOHC. NaCl, MgBr2, NH4OHD. Ba(OH)2, HNO3, H3PO4

45. Which of the following are produced when Ca + HCl react?A. CaHCl B. CaH + Cl2C. CaCl2 + H D. CaCl2 + H2

46. Which basic compound could be added to lakes to help deal with acid precipitation?A. NaCl B. NaOHC. CaCO3 D. HCl

47. Which of the following is a balanced equation for the reaction between an acid and a carbonate?A. 2CH3COOH + 2NaOH → 2NaCH3COO + H2OB. 2HCl + CaCO3 →CaCl2 + H2O + CO2

C. 2HCl + Mg →MgCl2 + H2

D. CO2 + H2O →H2CO3

48. Identify the products that complete the following reaction. H3PO4 + Ba(OH)2 _____

A. BaPO4 + H2O B. Ba3P2 + H2OC. BaH2PO4 + H2O D. Ba3(PO4)2 + H2O

49. Which of the following is not an organic compound?A. CH4 B. CO2

C. C6H5COOH D. K2HC6H5O7

50. Consider the following representation of 2-propanol, a kind of rubbing alcohol. What kind of representation is used in the diagram?

A. chemical name B. molecular formulaC. structural formula D. space-filling model

51. Which of the following is an organic compound?A. CaH3 B. H2CO3

C. C3H8O D. Ca2CO3

52. Ethanol (CH3CH2OH) is used in alcoholic beverages and also as a fuel. What kind of compound is ethanol?A. inorganic B. organicC. ionic D. multivalent

53. Which of the following is not an inorganic compound?A. methane B. carbon dioxideC. barium carbonate D. ammonium chloride

54. What type of reaction is the following?2Al + 3CuCl2 →2AlCl3 + 3CuA. synthesis B. neutralizationC. single replacement D. double replacement

55. KCl reacts with Pb(NO3)2. What type of reaction is this?A. combustion B. neutralizationC. single replacement D. double replacement

56. Solid magnesium reacts with nitric acid to produce hydrogen gas and another product. What is the other product that would be formed in this reaction? Mg + 2HNO3 ___ + H2

A. Mg(NO3)2 B. Mg3N2 C. MgO D. O2

57. What is the missing reactant in this synthesis reaction, and what are the coefficients needed to balance this equation?Na + ___ →NaFA. Na + F →NaF B. Na + F2 →NaF2

C. Na + F2→2NaF D. 2Na + F2 →2NaF

58. Which of the following balanced equations correctly represents the combustion of butene, C4H8?A. C4H8 + 6O2 →4CO2 + 4H2OB. C4H8 + O2 →8CO2 + 8H2OC. C4H8 + O2 →4CO2 + H2OD. C4H8 + O2 →CO2 + H2O

59. When zinc metal is added to hydrochloric acid, it reacts to produce hydrogen gas. Which of the following pairs would react at the greatest rate?A. a chunk of zinc and dilute HClB. a chunk of zinc and concentrated HClC. powdered zinc and dilute HClD. powdered zinc and concentrated HCl

60. In order to start a campfire, wood is chopped into many small pieces, called kindling. Which factor makes it easier to light a fire using kindling instead of large pieces of wood?A. temperature B. concentrationC. surface area D. catalyst

61. Food is digested in your body with the aid of a number of factors that affect the reaction rates. Which of the following affects the rate of food digestion by changing surface area?

A. chewing foodB. a body temperature of 37o CC. enzymes such as lipase and sucraseD. the concentration of HCl in the stomach

62. Thinking of factors that affect reaction rate, what first aid treatment should you use when you burn your hand on a hot stove or with hot water?A. Do nothing, as you have already stopped touching the hot object.B. Cover the burn with moisturizing cream.C. Cover your burn in butter or margarine.D. Run your hand under cold water

63. Which of the following is not a factor that affects the rate of reaction?A. changing the temperatureB. changing the colour of the reactantsC. changing the surface area of the reactantsD. changing the concentration of the reactants

64. Which of the following shows alpha radioactive decay?

65. Which of the following shows beta radioactive decay?

66. Which of the following is an example of gamma radioactive decay?

67. Which is the correct parent nucleus to give the following products?

68. If an isotope has 55 protons and 82 neutrons, which of the following correctly represents the isotope?

69. What is a half-life?A. the time required for nuclei to undergo nuclear fusionB. the time required for nuclei to undergo nuclear fissionC. the time required for half the nuclei in a sample to decayD. the time it takes for an isotope to react with any other substance to produce a new compound

70. The carbon-14 isotope has a half-life of 5730y. What percent of carbon-14 isotope will be present after 17,190y?A. 12.5 percent B. 25 percentC. 50 percent D. 100 percent

71. A 10 g sample of potassium-40 undergoes radioactive decay until 2.5 g of potassium-40 is present. How many half-lives have occurred?A. 0 B. 1C. 2 D. 3

72. If a 10 g rock sample of isotope undergoes two half-lives to make

daughter isotope , what is the mass of the total sample at the completion of the second half-life?A. 10 g B. 5.0 gC. 2.5 g D. 1.25 g

73. If you start with 100 g of isotope what mass of this parent material will be left after four half-lives?A. 50 g B. 25 gC. 12.5 g D. 6.25 g

74. What is nuclear fission?A. the process in which two low mass nuclei join together to make a more massive nucleusB. the process of cell division that results in two new cells that are identical to their parent cellC. the splitting of a massive nucleus into two less massive nuclei, subatomic particles, and energy

D. the process in which a parent cell splits into two daughter cells of approximately equal size, often occurring in single celled organisms

75. Which equation represents nuclear fission?

76. Which equation represents nuclear fusion?

77. Which of the following statements applies to nuclear fusion?A. All fusion reactions release massive amounts of energy.B. Unstable nuclei release a huge amount of energy when they split.C. A typical reaction for nuclear fusion is:D. A fusion reaction is used in modern nuclear weapons to generate most of the energy released in the blast.

78. How can a nuclear reaction be induced?A. by bombarding a nucleus with alpha particles, beta particles, or gamma raysB. by heating the reaction with your lab Bunsen burnerC. by inserting cadmium rods into the nuclear reactorD. by burning the nucleus using oxygen

79. Which two of the following atomic models represents elements that can easily combine with each other to form a covalent compound?

A. I and IIB. I and IVC. II and IIID. III and IV

80. Which of the following Lewis diagrams shows the valence electron arrangement for carbon?

Use the following Lewis diagrams of four unknown elements to answer question 81.

81. Which element will not combine with oxygen?A. JB. KC. LD. M

82. Which of the following represents the Lewis diagram of the molecule formed in the reaction shown below?

83. Which of the following is the term given to the scale on which each unit represents a 10-fold change in the hydrogen ion concentration?

A. pHB. indicatorC. acid/baseD. neutralization

84. Which of the following represents an organic molecule?

85. Which of the following correctly classifies each formula as an acid, base or salt?

Use the following diagram of a molecule to answer question 86.

86. What compound is represented by the illustrated molecule?A. nitric acidB. hydrogen nitrideC. nitrogen trioxideD. nitrogen hydroxide

87. If the compound HF reacts with KOH, what type of reaction has occurred?A. combustionB. neutralizationC. decompositionD. single replacement

88. Which of the following elements is more reactive than sodium?A. neonB. lithiumC. potassiumD. magnesium

89. Which of the following are characteristics of metals?

A. I onlyB. I and III onlyC. II and III onlyD. I, II and III only

90. Which of the following will form an acidic solution when dissolved in water?A. NO2B. CaOC. CuOD. Na2O

Use the following illustration to answer question 91.

91. Which formula is represented by the illustration?A. C3H7B. 3CH3C. CH3COOHD. CH3CH2CH3

92. Which of the following would provide the best data to support the Law of Conservation of Mass?

93. Which set of ordered coefficients correctly balances the following equation?

A. 1, 2, 3, 2B. 2, 1, 3, 2C. 2, 2, 1, 3D. 2, 3, 3, 1

Use the following information to answer question 94.

94. Which of the following products would balance the reaction?A. COB. CO2C. 2COD. 2CO2

95. When calcium metal is added to water, it reacts to produce calcium hydroxide and hydrogen gas.

Which one of the following reactions would progress at the greatest rate?

Use the following information from a student’s experiment to answer question 96.

A student used three different catalysts to increase the rate at whichH2O2 decomposes into O2 and water. He filled in the Observation Chart below

He also measured the volume of O2 produced during each reaction with different catalysts and recorded the information on the graph below.

96. Which conclusion is supported by the observations?A. MnO2 is the most effective catalyst.B. Catalysts have no effect on reaction rate.C. The reaction occurs most quickly if ZnO is added.D. All three catalysts cause O2 to be produced at the same rate

97. What isotope has 25 protons and 29 neutrons?A. copper-25B. copper-54C. manganese-29

D. manganese-54

98. A fossil is removed from a bedrock layer and is found to contain ¼ of the original amount of carbon-14. What conclusion can be made about the age of the fossil?A. It is 1 433 years old.B. It is 5 730 years old.C. It is 11 460 years old.D. It is 22 920 years old.

99. Which of the following are correct statements about nuclear fusion?

A. I and II onlyB. I and III onlyC. II and III onlyD. I, II and III

100. Which of the following completes the nuclear reaction shown?

A. one protonB. two protonsC. one neutronD. two neutrons