Question 1

Which of the following compounds will have the highest melting point?

Accepted Answer

A) SO₂ 
B) BaF₂ 
C) N₂H₄ 
D) SCl₆ 
A) SO₂ 
B) BaF₂ 
C) N₂H₄ 
D) SCl₆

Question 2

Water is a liquid at room temperature while methane is a gas.Which statement compares the intermolecular forces in these molecules correctly?

Accepted Answer

A) The intermolecular forces in methane are stronger than those in water. 
B) The intermolecular forces in water are stronger than those in methane. 
C) Both water and methane have the same intermolecular forces. 
D) There is not enough information to compare these forces. 
A) The intermolecular forces in methane are stronger than those in water. 
B) The intermolecular forces in water are stronger than those in methane. 
C) Both water and methane have the same intermolecular forces. 
D) There is not enough information to compare these forces.

Question 3

The temperature at which a liquid becomes a solid is called the

Accepted Answer

A) melting point. 
B) decomposition point. 
C) boiling point. 
D) condensation point. 
A) melting point. 
B) decomposition point. 
C) boiling point. 
D) condensation point.

Question 4

A gas

Accepted Answer

A) has a definite shape but no definite volume. 
B) has a definite volume but no definite shape. 
C) has both a definite shape and a definite volume. 
D) has no definite shape and no definite volume. 
A) has a definite shape but no definite volume. 
B) has a definite volume but no definite shape. 
C) has both a definite shape and a definite volume. 
D) has no definite shape and no definite volume.

Question 5

Matter is more likely to exist in the ________ state as the pressure is increased.

Accepted Answer

A) solid 
B) liquid 
C) gaseous 
D) elemental 
A) solid 
B) liquid 
C) gaseous 
D) elemental

Question 6

According to the kinetic-molecular theory,gas molecules have

Accepted Answer

A) strong interactions between molecules. 
B) weak interactions between molecules. 
C) little distance between molecules. 
D) less energy than molecules of a solid. 
A) strong interactions between molecules. 
B) weak interactions between molecules. 
C) little distance between molecules. 
D) less energy than molecules of a solid.

Question 7

Most organic solvents are toxic,but supercritical fluids are generally regarded as safe.

Accepted Answer

A) True 
 B)False

Question 8

The process by which a liquid is converted to a solid is called

Accepted Answer

A) condensation. 
B) freezing. 
C) liquefaction. 
D) vaporization. 
A) condensation. 
B) freezing. 
C) liquefaction. 
D) vaporization.

Question 9

If the temperature of a gas is lowered,the gas molecules will strike the walls of its container more frequently. (Assume that the container has a definite shape and volume.)

Accepted Answer

A) True 
 B)False

Question 10

A sample of gas at a temperature of 350 K has a volume of 4.00 L.The pressure remains constant.What is the volume of the gas at a temperature of 175 K?

Accepted Answer

A) 8)00 L 
B) 6)50 L 
C) 3)75 L 
D) 2)00 L 
A) 8)00 L 
B) 6)50 L 
C) 3)75 L 
D) 2)00 L

Question 11

In the ideal gas law equation,PV = nRT,R is known as

Accepted Answer

A) the pressure. 
B) a radian. 
C) the universal gas constant. 
D) a revolution. 
A) the pressure. 
B) a radian. 
C) the universal gas constant. 
D) a revolution.

Question 12

For which of the following is hydrogen bonding NOT a factor?

Accepted Answer

A) H₂O 
B) NH₃ 
C) CI₄ 
D) CH₃OH 
A) H₂O 
B) NH₃ 
C) CI₄ 
D) CH₃OH

Question 13

Ethane has the formula CH₃CH₃.What is the predominant intermolecular force between ethane molecules?

Accepted Answer

A) dipole forces 
B) dispersion forces 
C) hydrogen bonds 
D) ionic bonds 
A) dipole forces 
B) dispersion forces 
C) hydrogen bonds 
D) ionic bonds

Question 14

The temperature at which a liquid boils is the boiling point of the liquid.The boiling point is an indication of the intermolecular forces that hold the matter in the liquid state.Water,H₂O,boils at 100°C.Ethanol,C₂H₆O boils at 78°C.Ammonia,NH₃,boils at -33°C.Which one of the following ranks the intermolecular forces in these liquids from the strongest to the weakest?

Accepted Answer

A) Water > Ammonia > Ethanol 
B) Ammonia > Ethanol > Water 
C) Ethanol > Water > Ammonia 
D) Water > Ethanol > Ammonia 
A) Water > Ammonia > Ethanol 
B) Ammonia > Ethanol > Water 
C) Ethanol > Water > Ammonia 
D) Water > Ethanol > Ammonia

Question 15

Carbon dioxide is an example of a supercritical fluid.

Accepted Answer

A) True 
 B)False

Question 16

Liquid hydrogen is used as one part of the booster fuel in the space shuttle.What type of forces exist between hydrogen molecules in liquid hydrogen?

Accepted Answer

A) hydrogen bonding 
B) dipole forces 
C) dispersion forces 
D) ionic bonds 
A) hydrogen bonding 
B) dipole forces 
C) dispersion forces 
D) ionic bonds

Question 17

All of the following solvents are no longer widely used as solvents for nonpolar organic compounds EXCEPT

Accepted Answer

A) benzene. 
B) methylene chloride. 
C) supercritical carbon dioxide (scCO₂). 
D) perchloroethylene. 
A) benzene. 
B) methylene chloride. 
C) supercritical carbon dioxide (scCO₂). 
D) perchloroethylene.

Question 18

A gas is enclosed in a 15.0 L tank at 600 mm Hg pressure.Which of the following is a reasonable value for the pressure when the gas is pumped into a 3.00 L vessel?

Accepted Answer

A) 1000 mm Hg 
B) 120 mm Hg 
C) 3000 mm Hg 
D) 1200 mm Hg 
A) 1000 mm Hg 
B) 120 mm Hg 
C) 3000 mm Hg 
D) 1200 mm Hg

Question 19

The statement that the volume of a fixed amount of a gas at a constant pressure is directly proportional to its absolute temperature is known as ________ Law.

Accepted Answer

A) Charles's 
B) Boyle's 
C) Gay-Lussac's 
D) Avogadro's 
A) Charles's 
B) Boyle's 
C) Gay-Lussac's 
D) Avogadro's

Question 20

Use the ideal gas law to calculate the temperature when 0.300 mol of nitrogen gas at 1.40 atm pressure occupies a volume of 11.2 L.:R = 0.0821 L* atm/(K*mol).

Accepted Answer

A) 490 K 
B) 637 K 
C) 780 K 
D) 157 K 
A) 490 K 
B) 637 K 
C) 780 K 
D) 157 K

Exam 6: Gases, Liquids, Solids, and Intermolecular Forces

Which of the following compounds will have the highest melting point?

Water is a liquid at room temperature while methane is a gas.Which statement compares the intermolecular forces in these molecules correctly?

The temperature at which a liquid becomes a solid is called the

A gas

Matter is more likely to exist in the ________ state as the pressure is increased.

According to the kinetic-molecular theory,gas molecules have

Most organic solvents are toxic,but supercritical fluids are generally regarded as safe.

The process by which a liquid is converted to a solid is called

If the temperature of a gas is lowered,the gas molecules will strike the walls of its container more frequently. (Assume that the container has a definite shape and volume.)

A sample of gas at a temperature of 350 K has a volume of 4.00 L.The pressure remains constant.What is the volume of the gas at a temperature of 175 K?

In the ideal gas law equation,PV = nRT,R is known as

For which of the following is hydrogen bonding NOT a factor?

Ethane has the formula CH₃CH₃.What is the predominant intermolecular force between ethane molecules?

Carbon dioxide is an example of a supercritical fluid.

Liquid hydrogen is used as one part of the booster fuel in the space shuttle.What type of forces exist between hydrogen molecules in liquid hydrogen?

All of the following solvents are no longer widely used as solvents for nonpolar organic compounds EXCEPT

A gas is enclosed in a 15.0 L tank at 600 mm Hg pressure.Which of the following is a reasonable value for the pressure when the gas is pumped into a 3.00 L vessel?

The statement that the volume of a fixed amount of a gas at a constant pressure is directly proportional to its absolute temperature is known as ________ Law.

Use the ideal gas law to calculate the temperature when 0.300 mol of nitrogen gas at 1.40 atm pressure occupies a volume of 11.2 L.:R = 0.0821 L* atm/(K*mol).

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