Question 1

In general, the vapor pressure of a substance increases as _ increases.

Accepted Answer

A)  hydrogen bonding 
B)  temperature 
C)  molecular weight 
D)  viscosity 
E)  surface tension 
A)  hydrogen bonding 
B)  temperature 
C)  molecular weight 
D)  viscosity 
E)  surface tension

Question 2

Which of the following is not an existing or a potential application of the supercritical carbon dioxide?

Accepted Answer

A)  isolation of the flavor components of herbs and spices 
B)  extraction of essential flavor elements from hops for use in brewing 
C)  extraction of caffeine from coffee beans 
D)  use as a solvent in dry cleaning 
E)  use as a coolant in refrigeration 
A)  isolation of the flavor components of herbs and spices 
B)  extraction of essential flavor elements from hops for use in brewing 
C)  extraction of caffeine from coffee beans 
D)  use as a solvent in dry cleaning 
E)  use as a coolant in refrigeration

Question 3

Gallium crystallizes in a primitive cubic unit cell. The length of the unit cell edge is 3.70Å. The radius of a Ga atom is Å.

Accepted Answer

A)  Insufficient data is given. 
B)  7.40 
C)  0.930 
D)  3.70 
E)  1.85 
A)  Insufficient data is given. 
B)  7.40 
C)  0.930 
D)  3.70 
E)  1.85

Question 4

In liquids, the attractive intermolecular forces are .

Accepted Answer

A)  strong enough to hold molecules relatively close together 
B)  not strong enough to keep molecules from moving past each other 
C)  strong enough to keep the molecules confined to vibrating about their fixed lattice points 
D)  very weak compared with kinetic energies of the molecules 
E)  strong enough to hold molecules relatively close together but not strong enough to keep molecules from moving past each other 
A)  strong enough to hold molecules relatively close together 
B)  not strong enough to keep molecules from moving past each other 
C)  strong enough to keep the molecules confined to vibrating about their fixed lattice points 
D)  very weak compared with kinetic energies of the molecules 
E)  strong enough to hold molecules relatively close together but not strong enough to keep molecules from moving past each other

Question 5

Which one of the following should have the lowest boiling point?

Accepted Answer

A)  SiH4  
B)  PH3  
C)  H2S 
D)  H2O 
E)  HCl 
A)  SiH4  
B)  PH3  
C)  H2S 
D)  H2O 
E)  HCl

Question 6

Of the following, has the highest boiling point.

Accepted Answer

A)  Br2  
B)  O2  
C)  Cl2  
D)  N2  
E)  H2 
A)  Br2  
B)  O2  
C)  Cl2  
D)  N2  
E)  H2

Question 7

are particularly polarizable.

Accepted Answer

A)  Large polar molecules 
B)  Large nonpolar molecules 
C)  Small nonpolar molecules 
D)  Small polar molecules 
E)  Large molecules, regardless of their polarity, 
A)  Large polar molecules 
B)  Large nonpolar molecules 
C)  Small nonpolar molecules 
D)  Small polar molecules 
E)  Large molecules, regardless of their polarity,

Question 8

Which one of the following exhibits dipole- dipole attraction between molecules?

Accepted Answer

A)  XeF4  
B)  BCl3  
C)  Cl2  
D)  CO2  
E)  AsH3 
A)  XeF4  
B)  BCl3  
C)  Cl2  
D)  CO2  
E)  AsH3

Question 9

The slope of a plot of the natural log of the vapor pressure of a substance versus 1/T is .

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 10

Heats of vaporization are greater than heats of fusion.

Accepted Answer

A) True 
 B)False

Question 11

Which statement is true about liquids but not true about solids?

Accepted Answer

A)  They flow and are compressible. 
B)  They are highly ordered and not compressible. 
C)  They flow and are highly ordered. 
D)  They flow and are not compressible. 
E)  They assume both the volume and the shape of their containers. 
A)  They flow and are compressible. 
B)  They are highly ordered and not compressible. 
C)  They flow and are highly ordered. 
D)  They flow and are not compressible. 
E)  They assume both the volume and the shape of their containers.

Question 12

Which of the following has dispersion forces as its only intermolecular force?

Accepted Answer

A)  C6H13NH2 
B)  CH4 
C)  CH3Cl 
D)  HCl 
E)  NaCl 
A)  C6H13NH2 
B)  CH4 
C)  CH3Cl 
D)  HCl 
E)  NaCl

Question 13

When NaCl dissolves in water, aqueous Na+ and Cl- ions result. The force of attraction that exists between Na+ and H2O is called a(n) _ interaction.

Accepted Answer

A)  ion- dipole 
B)  hydrogen bonding 
C)  ion- ion 
D)  London dispersion force 
E)  dipole- dipole 
A)  ion- dipole 
B)  hydrogen bonding 
C)  ion- ion 
D)  London dispersion force 
E)  dipole- dipole

Question 14

The principal source of the difference in the normal boiling points of ICl (97°C; molecular mass 162 amu) and Br2 (59°C; molecular mass 160 amu) is both dipole- dipole interactions and London dispersion forces.

Accepted Answer

A) True 
 B)False

Question 15

How high a liquid will rise up a narrow tube as a result of capillary action depends on .

Accepted Answer

A)  gravity alone 
B)  only the magnitude of cohesive forces in the liquid 
C)  the viscosity of the liquid 
D)  the magnitudes of cohesive forces in the liquid and adhesive forces between the liquid and the tube, and gravity 
E)  only the magnitude of adhesive forces between the liquid and the tube 
A)  gravity alone 
B)  only the magnitude of cohesive forces in the liquid 
C)  the viscosity of the liquid 
D)  the magnitudes of cohesive forces in the liquid and adhesive forces between the liquid and the tube, and gravity 
E)  only the magnitude of adhesive forces between the liquid and the tube

Question 16

Based on the figure above, the boiling point of water under an external pressure of 0.316 atm atm is
__________°C.

Accepted Answer

A)  80 
B)  90 
C)  70 
D)  60 
E)  40 
A)  80 
B)  90 
C)  70 
D)  60 
E)  40

Question 17

The ease with which the charge distribution in a molecule can be distorted by an external electrical field is called the _ .

Accepted Answer

A)  polarizability 
B)  viscosity 
C)  hydrogen bonding 
D)  electronegativity 
E)  volatility 
A)  polarizability 
B)  viscosity 
C)  hydrogen bonding 
D)  electronegativity 
E)  volatility

Question 18

The critical temperature and pressure of CS2 are 279°C and 78 atm, respectively. At temperatures above 279°C, CS2 can only occur as a _.

Accepted Answer

A)  liquid and gas 
B)  solid 
C)  liquid 
D)  gas 
E)  supercritical fluid 
A)  liquid and gas 
B)  solid 
C)  liquid 
D)  gas 
E)  supercritical fluid

Question 19

C12 H26 molecules are held together by .

Accepted Answer

A)  ion- ion interactions 
B)  dispersion forces 
C)  hydrogen bonding 
D)  ion- dipole interactions 
E)  dipole- dipole interactions 
A)  ion- ion interactions 
B)  dispersion forces 
C)  hydrogen bonding 
D)  ion- dipole interactions 
E)  dipole- dipole interactions

Question 20

What portion of the volume of each atom or ion on the face of a unit cell is actually within the unit cell?

Accepted Answer

A)  3/4 
B)  1/4 
C)  1/2 
D)  all of it 
E)  none of it 
A)  3/4 
B)  1/4 
C)  1/2 
D)  all of it 
E)  none of it

Exam 11: Intermolecular Forces, Liquids, and Solids

In general, the vapor pressure of a substance increases as _ increases.

Which of the following is not an existing or a potential application of the supercritical carbon dioxide?

Gallium crystallizes in a primitive cubic unit cell. The length of the unit cell edge is 3.70Å. The radius of a Ga atom is Å.

In liquids, the attractive intermolecular forces are .

Which one of the following should have the lowest boiling point?

Of the following, has the highest boiling point.

are particularly polarizable.

Which one of the following exhibits dipole- dipole attraction between molecules?

The slope of a plot of the natural log of the vapor pressure of a substance versus 1/T is .

Heats of vaporization are greater than heats of fusion.

Which statement is true about liquids but not true about solids?

Which of the following has dispersion forces as its only intermolecular force?

When NaCl dissolves in water, aqueous Na+ and Cl- ions result. The force of attraction that exists between Na+ and H2O is called a(n) _ interaction.

The principal source of the difference in the normal boiling points of ICl (97°C; molecular mass 162 amu) and Br2 (59°C; molecular mass 160 amu) is both dipole- dipole interactions and London dispersion forces.

How high a liquid will rise up a narrow tube as a result of capillary action depends on .

Based on the figure above, the boiling point of water under an external pressure of 0.316 atm atm is __________°C.

The ease with which the charge distribution in a molecule can be distorted by an external electrical field is called the _ .

The critical temperature and pressure of CS2 are 279°C and 78 atm, respectively. At temperatures above 279°C, CS2 can only occur as a _.

C12 H26 molecules are held together by .

What portion of the volume of each atom or ion on the face of a unit cell is actually within the unit cell?

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Gases

Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Chemistry of Coordination Compounds

The Chemistry of Life: Organic and Biological Chemistry

Filters

When NaCl dissolves in water, aqueous Na⁺and Cl^-ions result. The force of attraction that exists between Na⁺and H₂O is called a(n) _ interaction.

The principal source of the difference in the normal boiling points of ICl (97°C; molecular mass 162 amu) and Br₂(59°C; molecular mass 160 amu) is both dipole- dipole interactions and London dispersion forces.

The critical temperature and pressure of CS₂are 279°C and 78 atm, respectively. At temperatures above 279°C, CS₂can only occur as a _.

C₁₂H₂₆molecules are held together by .