Question 1

Which of the following experiences the strongest London forces?

Accepted Answer

A)   carbon tetrachloride
B)   water
C)   hydrogen
D)   heliumE) B) and C)
F) A) and D)

Question 2

Which of the following will have the lowest boiling point?

Accepted Answer

A)   H₂S
B)   H₂Te
C)   H₂Se
D)   H₂OE) A) and B)
F) A) and C)

Question 3

Vancomycin is the first line of defense against bacteria.

Accepted Answer

A) True 
 B)False

Question 4

Match the temperatures with the best processes describe it.
-0 °C

Accepted Answer

A)  boiling point of ethanol
B)  boiling point of nitrogen
C)  deposition point of carbon dioxide
D)  boiling point of water
E)  melting point of waterF) boiling point of hydrogenG) C) and E)
H) A) and C)

Question 5

Identify each of the compounds as molecular or non-molecular.
-silicon dioxide

Accepted Answer

A)  non-molecular
B)  molecularC) A) and B)
D) undefined

Question 6

Polar molecules do not exhibit London forces.

Accepted Answer

A) True 
 B)False

Question 7

Which of the three phases of matter (solid, liquid, or gas)  features particles that are easily compressible?

Accepted Answer

A)   solid
B)   liquid
C)   gas
D)   All three phases of matter are compressible.E) A) and D)
F) A) and C)

Question 8

The freezing point of dry ice is 0 °C.

Accepted Answer

A) True 
 B)False

Question 9

Identify each of the compounds as molecular or non-molecular.
-water

Accepted Answer

A)  non-molecular
B)  molecularC) A) and B)
D) undefined

Question 10

The change of state from a solid to a liquid is called ________.

Accepted Answer

A)   melting
B)   sublimation
C)   evaporation
D)   condensationE) A) and C)
F) B) and C)

Question 11

Which of the following does not have a dipole?

Accepted Answer

A)   carbon tetrachloride
B)   acetone
C)   ammonia
D)   waterE) All of the above
F) A) and B)

Question 12

The replacement of a single NH group on vancomycin causes the antibiotic to become ineffective.

Accepted Answer

A) True 
 B)False

Question 13

The strength of a hydrogen bond is about ________ percent of the strength of a normal O-H bond

Accepted Answer

A)   1
B)   4
C)   16
D)   50E) A) and D)
F) A) and C)

Question 14

Match the temperatures with the best processes describe it.
--78 °C

Accepted Answer

A)  boiling point of ethanol
B)  boiling point of nitrogen
C)  deposition point of carbon dioxide
D)  boiling point of water
E)  melting point of waterF) boiling point of hydrogenG) C) and D)
H) A) and B)

Question 15

At the freezing point the molecules are effectively frozen in place.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following chemical substances would you expect to have the lowest boiling point (you may consider molecular mass and the degree of intermolecular forces as primary controlling factors) ?

Accepted Answer

A)   CH₄
B)   CH₃CH₃
C)   CH₃CH₂CH₃
D)   CH₃CH₂CH₂CH₃E) A) and C)
F) All of the above

Question 17

Quartz and diamond are non-molecular solids, where the atoms are held together with covalent bonds.

Accepted Answer

A) True 
 B)False

Question 18

Match the description of processes with its corresponding change of states.
-ice formation on a pond during winter

Accepted Answer

A)  sublimation
B)  evaporation
C)  melting
D)  condensation
E)  freezingF) A) and B)
G) A) and C)

Question 19

Which of the following will have the highest boiling point?

Accepted Answer

A)   HI
B)   HBr
C)   HCl
D)   HFE) B) and C)
F) B) and D)

Question 20

Match each of the substances with the STRONGEST type of bonding that it exhibits.
-hydrogen fluoride

Accepted Answer

A)  hydrogen bonding
B)  London forces
C)  network covalent bonding
D)  metallicE) C) and D)
F) None of the above

Exam 7: Intermolecular Forces and the Phases of Matter

The change of state from a solid to a liquid is called ________.

Correct AnswerverifiedShow Answer

Match the description of processes with its corresponding change of states. -ice formation on a pond during winter

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At the freezing point the molecules are effectively frozen in place.

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The freezing point of dry ice is 0 °C.

Correct AnswerverifiedShow Answer

The replacement of a single NH group on vancomycin causes the antibiotic to become ineffective.

Correct AnswerverifiedShow Answer

Which of the three phases of matter (solid, liquid, or gas) features particles that are easily compressible?

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Vancomycin is the first line of defense against bacteria.

Correct AnswerverifiedShow Answer

Which of the following does not have a dipole?

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Identify each of the compounds as molecular or non-molecular. -water

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Which of the following will have the highest boiling point?

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Which of the following chemical substances would you expect to have the lowest boiling point (you may consider molecular mass and the degree of intermolecular forces as primary controlling factors) ?

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Identify each of the compounds as molecular or non-molecular. -silicon dioxide

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Which of the following will have the lowest boiling point?

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The strength of a hydrogen bond is about ________ percent of the strength of a normal O-H bond

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Match the temperatures with the best processes describe it. --78 °C

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Which of the following experiences the strongest London forces?

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Match each of the substances with the STRONGEST type of bonding that it exhibits. -hydrogen fluoride

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Quartz and diamond are non-molecular solids, where the atoms are held together with covalent bonds.

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Polar molecules do not exhibit London forces.

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Match the temperatures with the best processes describe it. -0 °C

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