Question 1

Which of the following instruments is used to measure the pressure of a gas sample?

Accepted Answer

A)  an altimeter 
B)  a barometer 
C)  a manometer 
D)  an odometer 
A)  an altimeter 
B)  a barometer 
C)  a manometer 
D)  an odometer

Question 2

For small molecules, which of the following usually is the weakest intermolecular interaction?

Accepted Answer

A)  covalent bonding 
B)  dipole-dipole interactions 
C)  London dispersion forces 
D)  hydrogen bonding 
A)  covalent bonding 
B)  dipole-dipole interactions 
C)  London dispersion forces 
D)  hydrogen bonding

Question 3

In which state of matter are the attractive forces between molecules the weakest?

Accepted Answer

A)  solid 
B)  liquid 
C)  gaseous 
D)  None, the attractive forces are the same in all of them. 
A)  solid 
B)  liquid 
C)  gaseous 
D)  None, the attractive forces are the same in all of them.

Question 4

A certain quantity of neon gas is under 1.05 atm pressure at 303 K in a 10.0 L vessel. How many moles of neon are present?

Accepted Answer

A)  0.222 mol 
B)  0.402 mol 
C)  0.422 mol 
D)  2.37 mol 
A)  0.222 mol 
B)  0.402 mol 
C)  0.422 mol 
D)  2.37 mol

Question 5

Which of the following molecules can engage in hydrogen bonding?

Accepted Answer

A)  NH3 
B)  H2O 
C)  HF 
D)  all of these 
A)  NH3 
B)  H2O 
C)  HF 
D)  all of these

Question 6

Which regions of a heating curve correspond to regions where only a single phase of a material is present?

Accepted Answer

A)  horizontal regions 
B)  regions with negative slope 
C)  regions with positive slope 
D)  It depends on the material. 
A)  horizontal regions 
B)  regions with negative slope 
C)  regions with positive slope 
D)  It depends on the material.

Question 7

Consider the following phase diagram of water. The temperature and pressure scales are greatly reduced (and are non-linear)  
-Crossing the curve designated AC in the direction of high pressure to low pressure is associated with which of the following phase transitions?

Accepted Answer

A)  solid to liquid 
B)  solid to vapor 
C)  liquid to vapor 
D)  vapor to liquid 
A)  solid to liquid 
B)  solid to vapor 
C)  liquid to vapor 
D)  vapor to liquid

Question 8

Consider the following phase diagram of water. The temperature and pressure scales are greatly reduced (and are non-linear)  
-The substance shown in the image is dry ice (solid CO2) which is composed of molecules in the crystal lattice.   What type of intermolecular force holds the molecules together in the crystal?

Accepted Answer

A)  London dispersion forces 
B)  dipole-dipole interactions 
C)  hydrogen bonding 
D)  More than one of the above may be present. 
A)  London dispersion forces 
B)  dipole-dipole interactions 
C)  hydrogen bonding 
D)  More than one of the above may be present.

Question 9

Which physical state of matter could be represented by the following model?

Accepted Answer

A)  solid 
B)  liquid 
C)  gas 
A)  solid 
B)  liquid 
C)  gas

Question 10

Which of the following types of solid is most likely to have a low, but well defined, melting point?

Accepted Answer

A)  amorphous 
B)  ionic 
C)  molecular 
D)  network covalent 
A)  amorphous 
B)  ionic 
C)  molecular 
D)  network covalent

Question 11

Which of the following does not affect the boiling point of a liquid?

Accepted Answer

A)  the formula weight of the liquid molecules 
B)  the shape of the liquid molecules 
C)  the intermolecular forces between the liquid molecules 
D)  None, all of the above affect the boiling point. 
A)  the formula weight of the liquid molecules 
B)  the shape of the liquid molecules 
C)  the intermolecular forces between the liquid molecules 
D)  None, all of the above affect the boiling point.

Question 12

If the change from A to B as represented by the models given below occurred,     A B which of the following is correct?

Accepted Answer

A)  The velocity of the particles increases. 
B)  The strength of the intermolecular forces increases. 
C)  The kinetic energy of the particles decreases. 
D)  both b and c 
A)  The velocity of the particles increases. 
B)  The strength of the intermolecular forces increases. 
C)  The kinetic energy of the particles decreases. 
D)  both b and c

Question 13

Consider the following phase diagram of water. The temperature and pressure scales are greatly reduced (and are non-linear)  
-Consider the model shown below. Each sphere represents an atom.   To which of the following classification might this substance belong?

Accepted Answer

A)  ionic solid 
B)  amorphous solid 
C)  molecular solid 
D)  metallic solid 
A)  ionic solid 
B)  amorphous solid 
C)  molecular solid 
D)  metallic solid

Question 14

According to the kinetic molecular theory, which of the following is not true?

Accepted Answer

A)  The average kinetic energy of gas particles is proportional to the Celsius temperature. 
B)  Gas molecules are assumed to have no volume. 
C)  Gas pressure is caused by collisions between gas molecules and the container walls. 
D)  None, all of the above are true. 
A)  The average kinetic energy of gas particles is proportional to the Celsius temperature. 
B)  Gas molecules are assumed to have no volume. 
C)  Gas pressure is caused by collisions between gas molecules and the container walls. 
D)  None, all of the above are true.

Question 15

At what point is the vapor pressure of a liquid measured?

Accepted Answer

A)  When molecules escape from the liquid more rapidly than they are recaptured by the liquid. 
B)  When molecules are recaptured by the liquid more rapidly than they escape from the liquid. 
C)  When molecules escape and are recaptured at the same rate. 
D)  When the liquid has been totally converted to vapor. 
A)  When molecules escape from the liquid more rapidly than they are recaptured by the liquid. 
B)  When molecules are recaptured by the liquid more rapidly than they escape from the liquid. 
C)  When molecules escape and are recaptured at the same rate. 
D)  When the liquid has been totally converted to vapor.

Question 16

Which regions of a heating curve correspond to regions where two phases of a material are present?

Accepted Answer

A)  horizontal regions 
B)  regions with negative slope 
C)  regions with positive slope 
D)  It depends on the material. 
A)  horizontal regions 
B)  regions with negative slope 
C)  regions with positive slope 
D)  It depends on the material.

Question 17

Which of the following is most important in determining if a material will be a solid, a liquid or a gas?

Accepted Answer

A)  covalent bonds 
B)  intermolecular forces 
C)  intramolecular forces 
D)  nuclear forces 
A)  covalent bonds 
B)  intermolecular forces 
C)  intramolecular forces 
D)  nuclear forces

Question 18

At constant temperature the pressure on a 10.0 L sample of gas is changed from 1140 torr to 1.00 atm. What is the new volume of the gas sample?

Accepted Answer

A)  0.00877 L 
B)  6.67 L 
C)  15.0 L 
D)  114 L 
A)  0.00877 L 
B)  6.67 L 
C)  15.0 L 
D)  114 L

Question 19

Consider a substance as represented by the following models. The temperature of the substance is decreased to a very low value. ​       A B C
​
Which of the following models would best represent this substance at the lowered temperature?

Accepted Answer

A)  A 
B)  B 
C)  C 
A)  A 
B)  B 
C)  C

Question 20

Fullerenes are examples of which of the following type of solid?

Accepted Answer

A)  ionic 
B)  molecular 
C)  network covalent 
D)  polymeric 
A)  ionic 
B)  molecular 
C)  network covalent 
D)  polymeric

Exam 5: Gases, Liquids, and Solids

Which of the following instruments is used to measure the pressure of a gas sample?

For small molecules, which of the following usually is the weakest intermolecular interaction?

In which state of matter are the attractive forces between molecules the weakest?

A certain quantity of neon gas is under 1.05 atm pressure at 303 K in a 10.0 L vessel. How many moles of neon are present?

Which of the following molecules can engage in hydrogen bonding?

Which regions of a heating curve correspond to regions where only a single phase of a material is present?

Consider the following phase diagram of water. The temperature and pressure scales are greatly reduced (and are non-linear) -Crossing the curve designated AC in the direction of high pressure to low pressure is associated with which of the following phase transitions?

Which physical state of matter could be represented by the following model?

Which of the following types of solid is most likely to have a low, but well defined, melting point?

Which of the following does not affect the boiling point of a liquid?

If the change from A to B as represented by the models given below occurred, A B which of the following is correct?

Consider the following phase diagram of water. The temperature and pressure scales are greatly reduced (and are non-linear) -Consider the model shown below. Each sphere represents an atom. To which of the following classification might this substance belong?

According to the kinetic molecular theory, which of the following is not true?

At what point is the vapor pressure of a liquid measured?

Which regions of a heating curve correspond to regions where two phases of a material are present?

Which of the following is most important in determining if a material will be a solid, a liquid or a gas?

At constant temperature the pressure on a 10.0 L sample of gas is changed from 1140 torr to 1.00 atm. What is the new volume of the gas sample?

Consider a substance as represented by the following models. The temperature of the substance is decreased to a very low value. ​ A B C ​ Which of the following models would best represent this substance at the lowered temperature?

Fullerenes are examples of which of the following type of solid?

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Consider a substance as represented by the following models. The temperature of the substance is decreased to a very low value. A B C Which of the following models would best represent this substance at the lowered temperature?