Intermolecular Forces Pre-Quiz

Question 1
Polar liquids have stronger intermolecular forces than nonpolar liquids.

True

False

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Question 2
Polarity is more important than mass when determining which liquid will evaporate more easily.

True

False

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Question 3
Water separates from oil because they have different densities.

True

False

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Question 4
Intermolecular forces are forces between:

atoms.

electrons.

molecules.

none of these.

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Question 5
The boiling point depends on:

polarity.

mass.

both polarity and mass.

neither polarity or mass.

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Question 6
Which of the following situations would force liquid A to evaporate faster than liquid B:

A is more polar and has less mass.

A is more polar and has more mass.

A is less polar and has less mass.

A is less polar and has more mass.

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Question 7
Which would evaporate faster, H₂O or CH₄?

H₂O

CH₄

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Question 8
Which would evaporate faster, CCl₄ or CH₄?

CCl₄

CH₄

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Question 9
Water doesn't help with spicy food because:

Spicy food is polar.

Spicy food is nonpolar.

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Question 10
Hair spray can get an ink spot off of your clothes if:

Hair spray and ink have the same mass.

Hair spray and ink have the same density.

Hair spray and ink have the same polarity.

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Question 11
Intermolecular forces are different from the forces that keep the atoms in molecules together.

True

False

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Question 12
To understand intermolecular forces it is necessary to think of the molecule as a single unit that interacts with other molecules.

True

False

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Question 13
If the molecules are able to freely orient themselves, polar molecules will turn so that the negative end of one molecule is near the positive end of another molecule.

True

True

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Question 14
Intermolecular forces are always attractive forces.

True

False

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Question 15
Two nonpolar molecules will be attracted and have intermolecular forces.

True

False

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Question 16
Which have stronger intermolecular forces?

Polar molecules interacting with polar molecules.

Polar molecules interacting with nonpolar molecules.

Nonpolar molecules interacting with nonpolar molecules.

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Question 17
The mass of a molecule can be calculated from the atomic masses given on the periodic table.

True

False

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Question 18
The molecular mass of CO₂ is

28

36

44

52

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Question 19
The stronger the intermolecular forces, the harder it is to separate the molecules, and the harder it will be to evaporate.

True

False

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Question 20
Nonpolar liquids evaporate more easily than polar liquids when they both have the same mass.

True

False

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Question 21
The larger the mass, the harder it is to move the molecule, and the harder it will be to separate the molecules.

True

False

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Question 22
Molecules with less mass should evaporate more easily when they have the same polarity.

True

False

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Question 23
When they conflict, the only way to tell if polarity or mass has a greater effect on evaporation is to do an experiment.

True

False

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Question 24
Consider polar water and nonpolar, but very massive, oil.

According to polarity oil should evaporate faster.

According to mass the water should evaporate faster.

All of the above.

None of the above.

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Question 25
Molecules will mix and stay mixed if they have the same polarity.

True

False

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Question 26
Density determines which one will end up on top, but it isn't responsible for the separation of the molecules.

True

False

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Question 27
Surface tension is due to intermolecular forces.

True

False

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Question 28
Polar liquids with high masses will need more energy to boil.

True

False

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