APC chapters 8,9, 11 test review - roosevelt high school · page 11 APC chapters 8,9, 11 test review. 38. What is the name of the compound with the chemical formula (NH4)2S? A. ammonium

APC chapters 8,9, 11 test review

Name: Date:

1. Which statement correctly describes both gasesand liquids?

A. Their shapes stay the same in any container.

B. Their shapes change when they are in differentcontainers.

C. Their volumes stay the same in any container.

D. Their volumes change when they are indifferent containers.

2. Alex placed a small beaker of cold water on a hotplate and heated it for 10 minutes. He took thetemperature of the water several times during those10 minutes and recorded his data. Alex claims thatthe graph below shows the relationship betweentemperature and time when water is heated.

Which statement best explains why the temperatureleveled off in section 2 of the graph?

A. Alex turned off the hot plate so the water didnot get any warmer.

B. The water reached the boiling point, so thetemperature no longer increased.

C. An experimental error caused the graph tolevel off, because the water temperatureshould keep increasing over time.

D. Cold water heats faster than warm water, soonce the cold water was room temperature, ittook more than 10 minutes to make it hot.

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3. Under the same conditions of pressure andtemperature, a liquid differs from a gas becausethe molecules of the liquid

A. have no regular arrangement.

B. are in constant motion.

C. have stronger forces of attraction betweenthem.

D. take the shape of the container they are in.

4. If the attractive forces among solid particles areless than the attractive forces between the solidand a liquid, the solid will

A. probably form a new precipitate as its crystallattice is broken and re-formed.

B. be unaffected because attractive forces withinthe crystal lattice are too strong for thedissolution to occur.

C. begin the process of melting to form a liquid.

D. dissolve as particles are pulled away from thecrystal lattice by the liquid molecules.

5. When water changes from solid to liquid to gas,which statement is true?

A. The mass (amount) stays the same.

B. The temperature goes down.

C. The temperature stays the same.

D. The mass (amount) is greater.

6. Which of the following statements best explainswhy ice floats on water?

A. Water has a higher specific heat than ice.

B. Ice has the same molecular mass as water.

C. Heat is absorbed when water changes fromthe solid state to the liquid state.

D. Hydrogen bonding causes water to be lessdense in the solid state than in the liquidstate.

7. Which of the following statements best explainswhy water vapor condenses as temperaturedecreases?

A. Collisions between water vapor moleculesbecome elastic.

B. Water vapor molecules chemically react whenthey collide.

C. Water vapor molecules are pulled together bythe force of gravity.

D. Attractive forces between water vapormolecules overcome molecular motion.

page 2 APC chapters 8,9, 11 test review

8. Which of the following statements best describeswhat happens to water during evaporation?

A. The temperature of the water increases untilthe water molecules react with nitrogen in theair.

B. Water molecules on the surface overcomeintermolecular forces and change into the gasphase.

C. Water molecules on the surface come incontact with air molecules and are pulled intothe gas phase.

D. The temperature of the water increases untilthe water molecules separate and form oxygenand hydrogen gas.

9. The average distance between molecules alwaysincreases during which of the following phasechanges?

A. gas to solid B. liquid to gas

C. gas to liquid D. liquid to solid

10. Although H2O and H2S have similar moleculargeometries, they exist as different states of matterat 20◦C and 1 atm. Which of the followingstatements best explains why H2O is a liquid andH2S is a gas under these conditions?

A. H2O is less dense than H2S.

B. H2O is less chemically reactive than H2S.

C. H2O has a smaller molecular mass than H2S.

D. H2O has stronger intermolecular forces thanH2S.

11. The graph shows the temperature changes as asample of ice is heated.

What is happening during time ?

A. The liquid is evaporating.

B. The liquid is feezing.

C. The solid is freezing.

D. The solid is melting.


12. A solid substance is heated at a uniform rate. Thisgraph shows how the temperature of the substancechanges as heat is added.

According to the energy diagram shown, thesubstance will boil at what temperature?

A. −60◦C B. −10◦C

C. 90◦C D. 140◦C

13. This graph shows temperature vs. energy data fora substance.

What is the melting point of this substance?

A. 0◦C B. 20◦C C. 50◦C D. 90◦C

14. Consider this phase diagram:

At what temperature does the normal boiling pointoccur?

A. 45◦C B. 60◦C C. 100◦C D. 110◦C


15. This is a heating curve for a substance.

Between points X and Y , which would beobserved?

A. Solid and liquid will be present.

B. Only vapor will be present.

C. Liquid and vapor will be present.

D. Only liquid will be present.

16. Consider this phrase diagram.

What process is occurring when a substancechanges from point X (−130◦C and 50 kPa) topoint Y (30◦C and 100 kPa)?

A. boiling B. freezing

C. melting D. sublimation


17. This graph represents a heating curve of asubstance.

Which region on the graph represents the solidphase?

A. I B. II C. III D. IV

18. This diagram represents a phase diagram for asubstance.

At which point do solid, liquid, and gas phasesexist in equilibrium?

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


19. This graph represents a phase diagram for asubstance.

What is the state of the substance at point I?

A. gas B. liquid

C. liquid and gas D. solid and liquid

20. Which sequence represents matter that is losingenergy?

A. solid → gas → liquid

B. solid → liquid → gas

C. gas → solid → liquid

D. gas → liquid → solid

21. Use the information below to answer the followingquestion.

The following graph shows the change intemperature of a sample of H2O, which begins asice, as thermal energy is added.

Which region of the graph represents water H2Oin the liquid form only?

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

22. Which of these forms of water has the greatestkinetic energy?

A. boiling water B. melting water

C. freezing water D. condensing water


23. Which of the following models correctly representsthe compound phosphorus trichloride (PCl3)?

A.

B.

C.

D.

24. Which of the following illustrations represents apure substance?

A.

B.

C.

D.


25. Below are four ball-and-stick models representingcompounds. Which of these models best representsammonia (NH3)?

A.

B.

C.

D.

26. The chemical formula for ammonia is NH3. Whichof the following is the correct Lewis electron dotstructure for ammonia?

A.

B.

C.

D.

27. Limestone is a naturally occurring form of calciumcarbonate. The correct formula for limestone is

A. Ca(CO3)2. B. CaCO3.

C. Ca2CO3. D. Ca2(CO3)2.


28. The diagram below represents particles of differentelements in a crystal.

What type of bond holds these particles together?

A. covalent B. hydrogen

C. ionic D. polar

29. What is the correct name for the compound withthe chemical formula NH4NO3?

A. ammonium nitrate

B. hydro-nitrogen oxide

C. ammonia mononitrite

D. nitro-hydrogen nitrate

30. The Lewis dot structure of a compound is shownbelow.

Which of the following elements does X representin the structure?

A. carbon (C) B. nitrogen (N)

C. oxygen (O) D. fluorine (F)

31. Which of the following statements best explainswhy atoms bond?

A. Atoms bond to make new substances.

B. Atoms bond to become less chemically stable.

C. Atoms bond to change from a liquid to asolid.

D. Atoms bond to become more chemicallystable.

32. The chemical structure of formaldehyde is shownbelow.

What is the geometry around the carbon atom?

A. bent B. linear

C. tetrahedral D. trigonal planar


33. Two elements in a molecule have the sameelectronegativity values. Which of the followingmost likely holds the elements together and why?

A. an ionic bond, because electrons transfer fromone element to the other

B. a nonpolar covalent bond, because theelements share electrons equally

C. a polar covalent bond, because the elementsdo not share electrons equally

D. an intermolecular force, because the elementsdo not form a chemical bond

34. A leaf gently floats on a pond. Which of thefollowing statements best explains why the leafstays on top of the water?

A. The leaf has nonpolar covalent bonds betweenits atoms.

B. The density of the leaf is greater than thedensity of the water.

C. The water molecules are held tightly togetherby hydrogen bonding.

D. The hydrogen and oxygen atoms in the waterare chemically bonded.

35. In a hydrogen fluoride (HF) molecule, a hydrogenatom and a fluorine atom are held together by apolar covalent bond. Which of the following bestexplains why this bond is polar?

A. the large difference in the atomic radii ofhydrogen and fluorine atoms

B. the large difference in the atomic masses ofhydrogen and fluorine atoms

C. the large difference in the electronegativitiesof hydrogen and fluorine atoms

D. the large difference in the number of electronsof hydrogen and fluorine atoms

36. Which of the following are most directly involvedin chemical bonding?

A. protons B. neutrons

C. alpha particles D. valence electrons

37. Which of the following molecules has a nonpolarcovalent bond?

A. H − Br B. H − Cl

C. H − F D. H − H


38. What is the name of the compound with thechemical formula (NH4)2S?

A. ammonium sulfide B. hydrogen sulfate

C. sulfur hydride D. sulfuric acid

39. The diagram below shows three containers of gas.

Container R Container S Container T

Which list correctly describes the gases incontainers R, S, and T?

A. R = element, S = compound, T = mixture

B. R = compound, S = element, T = mixture

C. R = element, S = mixture, T = compound

D. R = mixture, S = element, T = compound

40. Which of the compounds is formed by a covalentbond?

A. NaCl B. CaCl2

C. NaBr D. C6H12O6

41. The diagram shows a model of a methanemolecule, which has the formula CH4.

Which phrase correctly describes the relationshipof the carbon and hydrogen atoms in a methanemolecule?

A. They are held together by ionic bonds.

B. They share electrons to form covalent bonds.

C. They bond to each other since all nuclei arepositively charged.

D. They are attracted to each other since thenucleus of each atom contains neutrons.


42. What is the name of the compound PbO2?

A. lead oxide B. lead(II) oxide

C. lead oxide(II) D. lead(IV) oxide

43. Which is the correct formula for dinitrogenpentoxide?

A. N4O B. NO2 C. N2O5 D. NO4

44. What type of bonding is associated withcompounds that have the following characteristics:

• high melting points

• conduct electricity in the molten state

• solutions conduct electricity

• normally crystalline solids at roomtemperature.

A. covalent B. ionic

C. hydrogen D. metallic

45. Based on the VSEPR theory, what is the moleculargeometry of a molecule of PI3?

A. linear B. tetrahedral

C. trigonal planar D. trigonal pyramidal

46. What is the shape of a molecule which has twoshared pairs of electrons and no unshared pairs?

A. tetrahedral B. bent

C. trigonal planar D. linear

47. A substance dissolves well in water but not inbenzene. Which of the following can be concludedabout the substance?

A. The substance may be either polar ornonpolar.

B. The substance is nonpolar.

C. The substance is polar.

D. The substance is neither polar nor nonpolar.

48. Based on the VSEPR theory, what is the moleculargeometry of CO2?

A. linear B. tetrahedral

C. trigonal planar D. trigonal pyramidal

49. Which compound has the lowest normal boilingpoint?

A. HCl B. H2S C. NH3 D. CH4


50. Why is NH3 classified as a polar molecule?

A. NH3 is a gas at STP.

B. N—H bonds are nonpolar.

C. Nitrogen and hydrogen are both nonmetals.

D. NH3 molecules have asymmetrical chargedistribution.

51. Which molecule is nonpolar?

A. H−Cl B. O=C=O

C. N. /H H

D. O. /H H

52. Which structural formula represents a nonpolarsymmetrical molecule?

A. O. /H H

B. H2H−−−C−−−H2

H

C. H−−−F D. N.2/H H H

53. Which substance is made up of molecules that aredipoles?

A. N2 B. H2O C. CH4 D. CO2

54. Which molecule is nonpolar due to a symmetricaldistribution of charge?

A. O===C===O B. O. /H H

C. H−−−N−−−H2H

D. H−−−Cl

55. In an experiment, a student determined the normalboiling points of four unknown liquids. Thecollected data were organized into the table shown.

UnknownLiquids

NormalBoiling Points (◦C)

A 10

B 33

C 78

D 100

Which unknown liquid has the weakest attractiveforces between its molecules?

A. A B. B C. C D. D


56. Which formula represents a polar molecule?

A. LiBr B. NaBr C. KBr D. HBr

57. At 25◦C, F2 is a gas but I2 is a solid. This ismost likely due to the fact that

A. F2 is a dipole but I2 is not

B. I2 is a dipole but F2 is not

C. F2 molecules have stronger intermolecularattractions

D. I2 molecules have stronger intermolecularattractions

58. Which structural formula represents a polarmolecule?

A. O..H−−−C/

OH

B. O===C===O

C. H−−−C≡≡≡C−−−H D. H2H−−−C−−−H2

H

59. When calcium chloride is dissolved in water, towhich end of the adjacent water molecules will acalcium ion be attracted?

A. the oxygen end, which is the negative pole

B. the oxygen end, which is the positive pole

C. the hydrogen end, which is the negative pole

D. the hydrogen end, which is the positive pole

60. Which two compounds contain only polarmolecules?

A. CCl4 and CH4 B. HCl and Cl2

C. HCl and NH3 D. CO and CO2

61. Organic compounds that are essentially nonpolarand exhibit weak intermolecular forces have

A. low vapor pressure

B. low melting points

C. high boiling points

D. high electrical conductivity in solution


62. The accompanying table shows the normal boilingpoint of four compounds.

Compound NormalBoiling Point (◦C)

Hf(`) 19.4

CH3Cl(`) −24.2

CH3F(`) −78.6

HCl(`) −83.7

Which compound has the strongest intermolecularforces?

A. HF(`) B. CH3Cl(`)

C. CH3F(`) D. HCl(`)

63. Hexane (C6H14) and water do not form a solution.Which statement explains this phenomenon?

A. Hexane is polar and water is nonpolar.

B. Hexane is ionic and water is polar.

C. Hexane is nonpolar and water is polar.

D. Hexane is nonpolar and water is ionic.

64. Which of these substances has the strongestintermolecular forces?

A. H2O B. H2S C. H2Se D. H2Te

65. Given the formula:

The bond between which two atoms has thegreatest degree of polarity?

A. C and C B. C and O

C. H and C D. H and O

66. Given the compound:

The symbol = represents

A. one pair of shared electrons

B. two pairs of shared electrons

C. a single covalent bond

D. a coordinate covalent bond

67. Given the structural formula:

H — C ≡ C — H

What is the total number of electrons shared inthe bond between the two carbon atoms?

A. 6 B. 2 C. 3 D. 4


68. Given the formula of a substance:

What is the total number of shared electrons in amolecule of this substance?

A. 22 B. 11 C. 9 D. 6

69. Given the formula for oxygen:

What is the total number of electrons sharedbetween the atoms represented in this formula?

A. 1 B. 2 C. 8 D. 4

70. The relatively high boiling point of water isprimarily due to the presence of

A. hydrogen bonds

B. van der Waals forces

C. molecule-ion attractions

D. ion-ion attractions

71. Hydrogen bonding is a type of

A. strong covalent bond

B. weak ionic bond

C. strong intermolecular force

D. weak intermolecular force


Problem-Attic format version 4.4.323c_ 2011–2018 EducAide Software

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APC chapters 8,9, 11 test review 11/5/2018

1.Answer: B

2.Answer: B

3.Answer: C

4.Answer: D

5.Answer: A

6.Answer: D

7.Answer: D

8.Answer: B

9.Answer: B

10.Answer: D

11.Answer: D

12.Answer: C

13.Answer: B

14.Answer: D

15.Answer: C

16.Answer: C

17.Answer: A

18.Answer: D

19.Answer: C

20.Answer: D

21.Answer: C

22.Answer: A

23.Answer: A

24.Answer: C

25.Answer: C

26.Answer: A

27.Answer: B

28.Answer: C

29.Answer: A

30.Answer: D

31.Answer: D

32.Answer: D

33.Answer: B

34.Answer: C

35.Answer: C

36.Answer: D

37.Answer: D

38.Answer: A

39.Answer: D

40.Answer: D

Teacher’s Key Page 2

41.Answer: B

42.Answer: D

43.Answer: C

44.Answer: B

45.Answer: D

46.Answer: D

47.Answer: C

48.Answer: A

49.Answer: D

50.Answer: D

51.Answer: B

52.Answer: B

53.Answer: B

54.Answer: A

55.Answer: A

56.Answer: D

57.Answer: D

58.Answer: A

59.Answer: A

60.Answer: C

61.Answer: B

62.Answer: A

63.Answer: C

64.Answer: A

65.Answer: D

66.Answer: B

67.Answer: A

68.Answer: A

69.Answer: D

70.Answer: A

71.Answer: C

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APC chapters 8,9, 11 test review - roosevelt high school · page 11 APC chapters 8,9, 11 test review. 38. What is the name of the compound with the chemical formula (NH4)2S? A. ammonium