Standardized Test Preparation
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Standardized Test Preparation . Chapter 6. Preview. Multiple Choice Short Answer Extended Response. Standardized Test Preparation . Chapter 6. Multiple Choice. 1. A chemical bond results from the mutual attraction of the nuclei for A. electrons. B. neutrons. C. protons.

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Preview

Standardized Test Preparation

Chapter 6

Preview

Multiple Choice

Short Answer

Extended Response


Multiple choice

Standardized Test Preparation

Chapter 6

Multiple Choice

  • 1.A chemical bond results from the mutual attraction of the nuclei for

  • A.electrons.

  • B.neutrons.

  • C.protons.

  • D.dipoles.


Multiple choice1

Standardized Test Preparation

Chapter 6

Multiple Choice

  • 1.A chemical bond results from the mutual attraction of the nuclei for

  • A.electrons.

  • B.neutrons.

  • C.protons.

  • D.dipoles.


Multiple choice2

Standardized Test Preparation

Chapter 6

Multiple Choice

  • 2. A polar covalent bond is likely to form between two atoms that

  • A.are similar in electronegativity.

  • B.are of similar size.

  • C.differ in electronegativity.

  • D.have the same number of electrons.


Multiple choice3

Standardized Test Preparation

Chapter 6

Multiple Choice

  • 2. A polar covalent bond is likely to form between two atoms that

  • A.are similar in electronegativity.

  • B.are of similar size.

  • C.differ in electronegativity.

  • D.have the same number of electrons.


Multiple choice4

Standardized Test Preparation

Chapter 6

Multiple Choice

  • 3. The Lewis structure of HCN contains

  • A.one double bond and one single bond.

  • B.one triple bond and one single bond.

  • C.two single bonds.

  • D.two double bonds.


Multiple choice5

Standardized Test Preparation

Chapter 6

Multiple Choice

  • 3. The Lewis structure of HCN contains

  • A.one double bond and one single bond.

  • B.one triple bond and one single bond.

  • C.two single bonds.

  • D.two double bonds.


Multiple choice6

Standardized Test Preparation

Chapter 6

Multiple Choice

  • 4. According to VSEPR theory, the molecular geometry for is

  • A.tetrahedral.

  • B.trigonal-pyramidal.

  • C.bent or angular.

  • D.None of the above


Multiple choice7

Standardized Test Preparation

Chapter 6

Multiple Choice

  • 4. According to VSEPR theory, the molecular geometry for is

  • A.tetrahedral.

  • B.trigonal-pyramidal.

  • C.bent or angular.

  • D.None of the above


Multiple choice8

Standardized Test Preparation

Chapter 6

Multiple Choice

  • 5. Which molecule contains a double bond?

  • A.COCl2

  • B.C2H6

  • C.CF4

  • D.SF2


Multiple choice9

Standardized Test Preparation

Chapter 6

Multiple Choice

  • 5. Which molecule contains a double bond?

  • A.COCl2

  • B.C2H6

  • C.CF4

  • D.SF2


Multiple choice10

Standardized Test Preparation

Chapter 6

Multiple Choice

  • 6. Which molecule is polar?

  • A.CCl4

  • B.CO2

  • C.SO3

  • D.none of these


Multiple choice11

Standardized Test Preparation

Chapter 6

Multiple Choice

  • 6. Which molecule is polar?

  • A.CCl4

  • B.CO2

  • C.SO3

  • D.none of these


Multiple choice12

Standardized Test Preparation

Chapter 6

Multiple Choice

  • 7. What is the hybridization of the carbon atoms in C2H2?

  • A.sp

  • B.sp2

  • C.sp3

  • D.The carbon atoms do not hybridize in C2H2.


Multiple choice13

Standardized Test Preparation

Chapter 6

Multiple Choice

  • 7. What is the hybridization of the carbon atoms in C2H2?

  • A.sp

  • B.sp2

  • C.sp3

  • D.The carbon atoms do not hybridize in C2H2.


Multiple choice14

Standardized Test Preparation

Chapter 6

Multiple Choice

  • 8. Which of the following compounds is predicted to have the highest boiling point?

  • A.HCl

  • B.CH3COOH (Note: the two oxygen atoms bond to the carbon)

  • C.Cl2

  • D.SO2


Multiple choice15

Standardized Test Preparation

Chapter 6

Multiple Choice

  • 8. Which of the following compounds is predicted to have the highest boiling point?

  • A.HCl

  • B.CH3COOH (Note: the two oxygen atoms bond to the carbon)

  • C.Cl2

  • D.SO2


Multiple choice16

Standardized Test Preparation

Chapter 6

Multiple Choice

  • 9. An unknown substance is an excellent electrical conductor in the solid state and is malleable. What type of chemical bonding does this substance exhibit?

  • A.ionic bonding

  • B.molecular bonding

  • C.metallic bonding

  • D.cannot determine from the information given


Multiple choice17

Standardized Test Preparation

Chapter 6

Multiple Choice

  • 9. An unknown substance is an excellent electrical conductor in the solid state and is malleable. What type of chemical bonding does this substance exhibit?

  • A.ionic bonding

  • B.molecular bonding

  • C.metallic bonding

  • D.cannot determine from the information given


Short answer

Standardized Test Preparation

Chapter 6

Short Answer

  • 10. What does the hybridization model help explain?


Short answer1

Standardized Test Preparation

Chapter 6

Short Answer

  • 10. What does the hybridization model help explain?

  • Answer: Hybridization explains how the orbitals of an atom become rearranged when the atom forms covalent bonds.


Short answer2

Standardized Test Preparation

Chapter 6

Short Answer

  • 11. Explain why ionic crystals are brittle.


Short answer3

Standardized Test Preparation

Chapter 6

Short Answer

  • 11. Explain why ionic crystals are brittle.

  • Answer: Ionic crystals are brittle because shifting of the layers of ions results in large repulsive forces that cause the layers to part completely.


Extended response

Standardized Test Preparation

Chapter 6

Extended Response

  • 12. Naphthalene, C10H8, is a nonpolar molecule and has a boiling point of 218°C. Acetic acid, CH3CO2H, is a polar molecule and has a boiling point of 118°C. Which substance has the stronger intermolecular forces? Briefly explain your answer.


Extended response1

Standardized Test Preparation

Chapter 6

Extended Response

  • 12. Naphthalene, C10H8, is a nonpolar molecule and has a boiling point of 218°C. Acetic acid, CH3CO2H, is a polar molecule and has a boiling point of 118°C. Which substance has the stronger intermolecular forces? Briefly explain your answer.

  • Answer:Naphthalene has the stronger intermolecular forces even though it is nonpolar, because its boiling point is higher than that of acetic acid. Boiling point is directly correlated to strength of intermolecular forces; the stronger the intermolecular forces, the more energy needed to break all the intermolecular forces, and therefore the higher the boiling point. Naphthalene is so large that its dispersion forces are greater than the sum of the dispersion forces and hydrogen bonding in acetic acid.


Extended response2

Standardized Test Preparation

Chapter 6

Extended Response

  • 13. Describe and explain the potential energy changes that occur during the formation of a covalent bond.


Extended response3

Standardized Test Preparation

Chapter 6

Extended Response

  • 13. Describe and explain the potential energy changes that occur during the formation of a covalent bond.

  • Answer: There is a repulsive region at small bond distances, a minimum well at an intermediate bond distance, and an asymptotic region at large bond distances. The repulsive region is due to the repulsion between the two positive nuclei at distances where the nuclei are close to each other. The asymptotic region is where the atoms are far apart and therefore do not interact with each other. The potential energy decreases as the atoms come closer together and are attracted to each other. The minimum well is the region where the attractive forces are balanced by the repulsive forces. This distance is the equilibrium bond length.


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