Chapter 6 Review

1. What intermolecular forces predominate when rubbing alcohol

(CH3CHOHCH3) and water are mixed?

a. b. c. d.

25% 25%25%25%

a. hydrogen bondingb. induced dipole attractionsc. Van der Waals attractionsd. London dispersion forces

2. At room temperature water is a liquid, while carbon dioxide is a gas, and sodium chloride is a

solid. Which of the following is the best explanation for this observation?

a. b. c. d.

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a. water is the lightest substance and sodium chloride is the heaviest

b. attractive forces between particles is greatest in sodium chloride and weakest in carbon dioxide

c. carbon dioxide contains oxygen and oxygen is a gas at room temperature

d. sodium chloride contains a metal while water and carbon dioxide do not

3. Which of the following form hydrogen bonds?

1. 2. 3. 4.

25% 25%25%25%a. H2

b. Cl2

c. both of the aboved. neither of the above

4. Put the following substances in order from weakest attractive forces to strongest attractive

forces. Sodium chloride, carbon monoxide, drinking water

a. b. c. d.

25% 25%25%25%

a. sodium choride, carbon monoxide, drinking waterb. carbon monoxide, sodium chloride, drinking waterc. sodium chloride, drinking water, carbon monoxided. carbon monoxide, drinking water, sodium chloride

5. Which of the following tables is accurate?

1. 2. 3. 4.

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a. Ionic: High melting point High conductivity High hardness Covalent: Low melting point Low conductivity Low hardness

b. Ionic: Low melting point High conductivity High hardness Covalent: High melting point Low conductivity Low hardness

c. Ionic: High melting point Low conductivity Low hardness Covalent: Low melting point High conductivity High hardness

d. Ionic: Low melting point Low conductivity Low hardness Covalent: High melting point High conductivity High hardness

6. The melting point of a compound is 1200°C. The compound is most likely a(n)

a. b. c. d.

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a. ionic compound b. covalent compoundc. catatonic compound d. noble gas

7. Which molecule will not undergo hydrogen bonding?

a. b. c. d.

25% 25%25%25%

a. HF b. NH3

c. H2O

d. CH4

8. Which combination of atoms can form a polar covalent bond?

a. b. c. d.

25% 25%25%25%

a. H and H b. N and Nc. H and Br d. Na and Br

9. Which of the following would you expect to have the highest boiling point?

a. b. c. d.

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a. fluorine b. brominec. chlorine d. iodine

10. What type of intermolecular forces are represented by the diagram

below?

1. 2. 3. 4.

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a. dipole-dipole forces b. ionic bondingc. London dispersion forces d. hydrogen bonding

1.What type of intermolecular forces are represented by the diagram below?•dipole-dipole forces •ionic bonding•London dispersion forces •hydrogen bonding

11. What type of intermolecular forces are represented by the diagram

below?

1. 2. 3. 4.

25% 25%25%25%

a. dipole-dipole forces b. ionic bondingc. London dispersion forces d. hydrogen bonding

12. What type of intermolecular forces are represented by the diagram

below?

1. 2. 3. 4.

25% 25%25%25%

a. dipole-dipole forces b. ionic bondingc. London dispersion forces d. hydrogen bonding

13. What type of intermolecular forces are represented by the diagram

below?

1. 2. 3. 4.

25% 25%25%25%

a. dipole-dipole forces b. ionic bondingc. London dispersion forces d. hydrogen bonding

14. The melting and boiling points for water are significantly higher than other small molecules of similar mass, such as methane (CH4). Which of the

following forces is stronger in water than in the other substances and is therefore responsible for this

observation?

a. b. c. d.

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a. London dispersion forces b. covalent bondsc. dipole-dipole forces d. hydrogen bonds

15. Which of the following elements would have the greatest force of attraction between like

molecules?

a. b. c. d.

25% 25%25%25%a. O2

b. I2

c. H2

d. N2

16. Based on the strength of intermolecular forces, which of the following covalent compounds would be

expected to have the highest melting point?

a. b. c. d.

25% 25%25%25%a. H2O

b. CO2

c. SO2

d. CH4

17. Attractive forces that exist between particles are called what?

a. b. c. d.

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a. intermolecular forcesb. intramolecular forcesc. heteromolecular forcesd. intravenous-molecular forces

18. What takes place within the electron cloud of an atom?

a. b. c. d.

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a. Electrons acquire positive charge.

b. Electrons acquire negative charge.

c. Electrons are fixed in positions.d. Electrons are in constant

motion.

19. How is an induced dipole created?

a. b. c. d.

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a. by an electron positioning next to itb. by an electron inversion near itc. by dipoles placed on both sides of itd. by the presence of a dipole next to it

20. Polarizability is defined how?

1. 2. 3. 4.

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a. by how easily an atom changes shape and charge

b. by how deformable an atomic nucleus is

c. by how deformable an electron cloud is

d. by how easily an electron changes shape and charge

21. What does the following say about the polarizability of the anions of the following compounds: F2, Cl2, Br2—that as their mass

increases, their melting point increases?

a. b. c. d.

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a. Polarizability decreases with decreasing mass in a column of the periodic table.

b. Polarizability increases with decreasing mass in a column of the periodic table.

c. Polarizability decreases with increasing mass in a column of the periodic table.

d. Polarizability increases with increasing mass in a column of the periodic table.

22. Which is the correct order of polarizability for the following,

from least to most?

a. b. c. d.

25% 25%25%25%

a. H2S, H2O, H2Se

b. H2Se, H2O, H2S

c. H2O, H2Se, H2S

d. H2O, H2S, H2Se

23. How would the following—HCl, HF, and HBr—be ranked from least

to most polarizable?

a. b. c. d.

25% 25%25%25%a. HCl, HF, HBrb. HF, HCl, HBrc. HF, HBr, HCld. HBr, HCl, HF

24. How would the following, Ne, Kr, Ar, He, be ordered from lowest

to highest melting point?

a. b. c. d.

25% 25%25%25%a. He, Ne, Ar, Krb. Kr, He, Ar, Nec. He, Ar, Ne, Krd. Kr, Ar, Ne, He

25. To what is the positive region of a polar molecule attracted?

a. b. c. d.

25% 25%25%25%

a. a magnetb. the positive region of a

neighboring moleculec. the negative region of a

neighboring moleculed. to a non-polar molecule, thus

inducing a dipole

26. Which bond would have the greatest dipole?

a. b. c. d.

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a. Si-Hb. H-Hc. O-Hd. Br-H

27. Which of the following would have no dipole?

a. b. c. d.

25% 25%25%25%a. H-Hb. H-Fc. H-Cd. H-Cl

28. Which of the following will form hydrogen bonds?

a. b. c. d.

25% 25%25%25%a. methanol, CH3OH

b. water, H2O

c. neither of the aboved. both of the above