Question 1

CsCl crystallizes in a unit cell that contains a Cs+ ion at the center of a cube and a Cl- ion at each corner. The unit cell of CsCl is .

Accepted Answer

A)  amorphous 
B)  primitive cubic 
C)  close packed 
D)  body- centered cubic 
E)  face- centered cubic 
A)  amorphous 
B)  primitive cubic 
C)  close packed 
D)  body- centered cubic 
E)  face- centered cubic B

Question 2

The predominant intermolecular force in (CH3)2NH is .

Accepted Answer

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

Question 3

The unit cell with all sides the same length and all angles equal to 90° that has lattice points only at the corners is called .

Accepted Answer

A)  primitive cubic 
B)  spherical cubic 
C)  face- centered cubic 
D)  monoclinic 
E)  body- centered cubic 
A)  primitive cubic 
B)  spherical cubic 
C)  face- centered cubic 
D)  monoclinic 
E)  body- centered cubic A

Question 4

Elemental iodine (I2) is a solid at room temperature. What is the major attractive force that exists among different I2 molecules in the solid?

Accepted Answer

A)  dipole- dipole attractions 
B)  covalent- ionic interactions 
C)  London dispersion forces 
D)  dipole- dipole rejections 
E)  ionic- dipole interactions 
A)  dipole- dipole attractions 
B)  covalent- ionic interactions 
C)  London dispersion forces 
D)  dipole- dipole rejections 
E)  ionic- dipole interactions

Question 5

The phase changes B -C and D -E are not associated with temperature increases because the heat energy is used up to .

Accepted Answer

A)  rearrange atoms within molecules 
B)  break intramolecular bonds 
C)  increase distances between molecules 
D)  increase the density of the sample 
E)  increase the velocity of molecules 
A)  rearrange atoms within molecules 
B)  break intramolecular bonds 
C)  increase distances between molecules 
D)  increase the density of the sample 
E)  increase the velocity of molecules

Question 6

Metallic solids do not exhibit .

Accepted Answer

A)  extreme brittleness 
B)  variable hardness 
C)  excellent thermal conductivity 
D)  variable melting point 
E)  excellent electrical conductivity 
A)  extreme brittleness 
B)  variable hardness 
C)  excellent thermal conductivity 
D)  variable melting point 
E)  excellent electrical conductivity

Question 7

Which one of the following substances will not have hydrogen bonding as one of its intermolecular forces?

Accepted Answer

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

Question 8

The substance with the largest heat of vaporization is _ .
I2
Br2 Cl2 F2 O2

Accepted Answer

A)  O2  
B)  Cl2  
C)  I2  
D)  F2  
E)  Br2 
A)  O2  
B)  Cl2  
C)  I2  
D)  F2  
E)  Br2

Question 9

A volatile liquid is one that .

Accepted Answer

A)  is highly viscous 
B)  readily evaporates 
C)  is highly flammable 
D)  is highly cohesive 
E)  is highly hydrogen- bonded 
A)  is highly viscous 
B)  readily evaporates 
C)  is highly flammable 
D)  is highly cohesive 
E)  is highly hydrogen- bonded

Question 10

The phase diagram of a substance is given above. The region that corresponds to the solid phase is

Accepted Answer

A)  w 
B)  x 
C)  y 
D)  z 
E)  x and y 
A)  w 
B)  x 
C)  y 
D)  z 
E)  x and y

Question 11

Which of the following molecules has hydrogen bonding as its only intermolecular force?

Accepted Answer

A)  HF 
B)  H2O 
C)  C5H11OH 
D)  C6H13NH2 
E)  None, all of the above exhibit dispersion forces. 
A)  HF 
B)  H2O 
C)  C5H11OH 
D)  C6H13NH2 
E)  None, all of the above exhibit dispersion forces.

Question 12

Chromium crystallizes in a body- centered cubic unit cell. There are chromium atoms per unit cell.

Accepted Answer

The answer of Chromium crystallizes in a body- centered cubic...

Question 13

Which of the following is not a type of solid? ionic
Molecular supercritical metallic
Covalent- network

Accepted Answer

A)  molecular 
B)  metallic 
C)  supercritical 
D)  covalent- network 
E)  ionic 
A)  molecular 
B)  metallic 
C)  supercritical 
D)  covalent- network 
E)  ionic

Question 14

Hydrogen bonding is a special case of _ .

Accepted Answer

A)  ion- dipole attraction 
B)  London- dispersion forces 
C)  dipole- dipole attractions 
D)  none of the above 
E)  ion- ion interactions 
A)  ion- dipole attraction 
B)  London- dispersion forces 
C)  dipole- dipole attractions 
D)  none of the above 
E)  ion- ion interactions

Question 15

In which of the following molecules is hydrogen bonding likely to be the most significant component of the total intermolecular forces?

Accepted Answer

A)  C5H11OH 
B)  CO2 
C)  CH3OH 
D)  CH4 
E)  C6H13NH2 
A)  C5H11OH 
B)  CO2 
C)  CH3OH 
D)  CH4 
E)  C6H13NH2

Question 16

Based on the figure above, the boiling point of ethyl alcohol under an external pressure of 0.0724 atm is °C.

Accepted Answer

A)  60 
B)  80 
C)  40 
D)  70 
E)  20 
A)  60 
B)  80 
C)  40 
D)  70 
E)  20

Question 17

Large intermolecular forces in a substance are manifested by .

Accepted Answer

A)  high critical temperatures and pressures 
B)  high heats of fusion and vaporization 
C)  high boiling point 
D)  low vapor pressure 
E)  all of the above 
A)  high critical temperatures and pressures 
B)  high heats of fusion and vaporization 
C)  high boiling point 
D)  low vapor pressure 
E)  all of the above

Question 18

The property responsible for the "beading up" of water is .

Accepted Answer

A)  surface tension 
B)  hydrogen bonding 
C)  vapor pressure 
D)  density 
E)  viscosity 
A)  surface tension 
B)  hydrogen bonding 
C)  vapor pressure 
D)  density 
E)  viscosity

Question 19

Of the following substances, only has London dispersion forces as the only intermolecular force.

Accepted Answer

A)  Kr 
B)  HCl 
C)  CH3OH 
D)  H2S 
E)  NH3 
A)  Kr 
B)  HCl 
C)  CH3OH 
D)  H2S 
E)  NH3

Question 20

Of the following, should have the highest critical temperature.

Accepted Answer

A)  CCl4  
B)  CF4  
C)  H2  
D)  CBr4  
E)  CH4 
A)  CCl4  
B)  CF4  
C)  H2  
D)  CBr4  
E)  CH4

Exam 11: Intermolecular Forces, Liquids, and Solids

CsCl crystallizes in a unit cell that contains a Cs+ ion at the center of a cube and a Cl- ion at each corner. The unit cell of CsCl is .

The predominant intermolecular force in (CH3)2NH is .

The unit cell with all sides the same length and all angles equal to 90° that has lattice points only at the corners is called .

Elemental iodine (I2) is a solid at room temperature. What is the major attractive force that exists among different I2 molecules in the solid?

The phase changes B -C and D -E are not associated with temperature increases because the heat energy is used up to .

Metallic solids do not exhibit .

Which one of the following substances will not have hydrogen bonding as one of its intermolecular forces?

The substance with the largest heat of vaporization is _ . I2 Br2 Cl2 F2 O2

A volatile liquid is one that .

The phase diagram of a substance is given above. The region that corresponds to the solid phase is

Which of the following molecules has hydrogen bonding as its only intermolecular force?

Chromium crystallizes in a body- centered cubic unit cell. There are chromium atoms per unit cell.

Which of the following is not a type of solid? ionic Molecular supercritical metallic Covalent- network

Hydrogen bonding is a special case of _ .

In which of the following molecules is hydrogen bonding likely to be the most significant component of the total intermolecular forces?

Based on the figure above, the boiling point of ethyl alcohol under an external pressure of 0.0724 atm is °C.

Large intermolecular forces in a substance are manifested by .

The property responsible for the "beading up" of water is .

Of the following substances, only has London dispersion forces as the only intermolecular force.

Of the following, should have the highest critical temperature.

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

CsCl crystallizes in a unit cell that contains a Cs⁺ion at the center of a cube and a Cl^-ion at each corner. The unit cell of CsCl is .

The predominant intermolecular force in (CH₃)₂NH is .

Elemental iodine (I₂) is a solid at room temperature. What is the major attractive force that exists among different I₂molecules in the solid?

The substance with the largest heat of vaporization is _ . I₂ Br₂Cl₂F₂O₂