Question 1

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

Accepted Answer

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

Question 2

-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 3

-The normal boiling point of the substance with the phase diagram shown above is ________ °C.

Accepted Answer

A) 10 
B) 20 
C) 30 
D) 40 
E) 50 
A) 10 
B) 20 
C) 30 
D) 40 
E) 50

Question 4

What types of intermolecular forces exist between NH3 and HF?

Accepted Answer

A) dispersion forces and dipole-dipole forces 
B) dispersion forces and hydrogen bonds 
C) dispersion forces, dipole-dipole forces, and hydrogen bonds 
D) dispersion forces 
E) dispersion forces, hydrogen bonds, and ion-dipole forces 
A) dispersion forces and dipole-dipole forces 
B) dispersion forces and hydrogen bonds 
C) dispersion forces, dipole-dipole forces, and hydrogen bonds 
D) dispersion forces 
E) dispersion forces, hydrogen bonds, and ion-dipole forces

Question 5

The intermolecular force(s)responsible for the fact that CH4 has the lowest boiling point in the set CH4, SiH4, GeH4, SnH4 is/are ________.

Accepted Answer

A) hydrogen bonding 
B) dipole-dipole interactions 
C) London dispersion forces 
D) mainly hydrogen bonding but also dipole-dipole interactions 
E) mainly London-dispersion forces but also dipole-dipole interactions 
A) hydrogen bonding 
B) dipole-dipole interactions 
C) London dispersion forces 
D) mainly hydrogen bonding but also dipole-dipole interactions 
E) mainly London-dispersion forces but also dipole-dipole interactions

Question 6

Of the following substances, ________ has the highest boiling point.

Accepted Answer

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

Question 7

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

Accepted Answer

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

Question 8

Of the following, ________ is the least volatile.

Accepted Answer

A) CI4 
B) CF4 
C) CBr4 
D) CCl4 
E) CH4 
A) CI4 
B) CF4 
C) CBr4 
D) CCl4 
E) CH4

Question 9

For a given substance that exhibits liquid-crystalline properties, the transition from solid to liquid-crystal state occurs ________.

Accepted Answer

A) over a range of temperatures between the melting point of the solid and the boiling point of the liquid 
B) at the melting point of the solid 
C) over a range of temperatures that includes the melting point of the solid 
D) at a well-defined temperature above the melting point of the solid 
E) at a well-defined temperature below the melting point of the solid 
A) over a range of temperatures between the melting point of the solid and the boiling point of the liquid 
B) at the melting point of the solid 
C) over a range of temperatures that includes the melting point of the solid 
D) at a well-defined temperature above the melting point of the solid 
E) at a well-defined temperature below the melting point of the solid

Question 10

Boron triiodide (BI3)melts at 49.9 °C and boils at 209.5 °C at a constant pressure of 1 atm. What state of matter must a sample of boron triiodide be in at 100°C and 1 atm?

Accepted Answer

A) liquid 
B) gas 
C) solid 
D) solid and liquid in equilibrium 
E) liquid and gas in equilibrium 
A) liquid 
B) gas 
C) solid 
D) solid and liquid in equilibrium 
E) liquid and gas in equilibrium

Question 11

What intermolecular force is responsible for the fact that ice is less dense than liquid water?

Accepted Answer

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

Question 12

As a gaseous element condenses, the atoms become ________ and they have ________ attraction for one another.

Accepted Answer

A) more separated, more 
B) more separated, less 
C) closer together, more 
D) closer together, less 
E) larger, greater 
A) more separated, more 
B) more separated, less 
C) closer together, more 
D) closer together, less 
E) larger, greater

Question 13

A ________ liquid crystal has the least order and is the most liquid-like.

Accepted Answer

A) nematic 
B) smectic 
C) cholesteric 
D) smectic B 
E) smectic C 
A) nematic 
B) smectic 
C) cholesteric 
D) smectic B 
E) smectic C

Question 14

What is the predominant intermolecular force in H2NNH2?

Accepted Answer

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

Question 15

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

Question 16

-On the phase diagram shown above, the coordinates of point ________ correspond to the critical temperature and pressure.

Accepted Answer

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

Question 17

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

Accepted Answer

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

Question 18

Which of the following characteristics would prevent liquid crystal behavior?

Accepted Answer

A) long axial structure 
B) ionic configuration 
C) carbon-carbon single bonds 
D) double bonding 
E) polar groups 
A) long axial structure 
B) ionic configuration 
C) carbon-carbon single bonds 
D) double bonding 
E) polar groups

Question 19

What type(s)of intermolecular forces exist between Br2 and CCl4?

Accepted Answer

A) dispersion forces 
B) dispersion forces and ion-dipole 
C) dispersion forces and dipole-dipole 
D) dispersion forces, ion-dipole, and dipole-dipole 
E) None. Since both are gases at room temperature, they do not interact with each other. 
A) dispersion forces 
B) dispersion forces and ion-dipole 
C) dispersion forces and dipole-dipole 
D) dispersion forces, ion-dipole, and dipole-dipole 
E) None. Since both are gases at room temperature, they do not interact with each other.

Question 20

In liquids, the attractive intermolecular forces are ________.

Accepted Answer

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

Exam 11: Liquids and Intermolecular Forces

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

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

-The normal boiling point of the substance with the phase diagram shown above is ________ °C.

What types of intermolecular forces exist between NH3 and HF?

The intermolecular force(s)responsible for the fact that CH4 has the lowest boiling point in the set CH4, SiH4, GeH4, SnH4 is/are ________.

Of the following substances, ________ has the highest boiling point.

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

Of the following, ________ is the least volatile.

For a given substance that exhibits liquid-crystalline properties, the transition from solid to liquid-crystal state occurs ________.

Boron triiodide (BI3)melts at 49.9 °C and boils at 209.5 °C at a constant pressure of 1 atm. What state of matter must a sample of boron triiodide be in at 100°C and 1 atm?

What intermolecular force is responsible for the fact that ice is less dense than liquid water?

As a gaseous element condenses, the atoms become ________ and they have ________ attraction for one another.

A ________ liquid crystal has the least order and is the most liquid-like.

What is the predominant intermolecular force in H2NNH2?

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

-On the phase diagram shown above, the coordinates of point ________ correspond to the critical temperature and pressure.

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

Which of the following characteristics would prevent liquid crystal behavior?

What type(s)of intermolecular forces exist between Br2 and CCl4?

In liquids, the attractive intermolecular forces are ________.

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

What types of intermolecular forces exist between NH₃ and HF?

The intermolecular force(s)responsible for the fact that CH₄ has the lowest boiling point in the set CH₄, SiH₄, GeH₄, SnH₄ is/are ________.

Boron triiodide (BI₃)melts at 49.9 °C and boils at 209.5 °C at a constant pressure of 1 atm. What state of matter must a sample of boron triiodide be in at 100°C and 1 atm?

As a gaseous element condenses, the atoms become and they have attraction for one another.

What is the predominant intermolecular force in H₂NNH₂?

What type(s)of intermolecular forces exist between Br₂ and CCl₄?