Question 1

According to the phase diagram shown above,what is the normal boiling point (°C)?

Accepted Answer

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

Question 2

According to the phase diagram shown above,what is the normal melting point (°C)?

Accepted Answer

A) -13 
B) 0 
C) 38 
D) 10 
E) 29 
A) -13 
B) 0 
C) 38 
D) 10 
E) 29

Question 3

What types of intermolecular forces exist between CH3OH and H2O?

Accepted Answer

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

Question 4

Together,liquids and solids constitute ________ phases of matter.

Accepted Answer

A) the compressible 
B) the fluid 
C) the condensed 
D) all of the 
E) the disordered 
A) the compressible 
B) the fluid 
C) the condensed 
D) all of the 
E) the disordered

Question 5

Molecules with ________ do not generally exhibit liquid-crystalline properties because they lack the rigidity necessary for alignment.

Accepted Answer

A) both single and double bonds 
B) double or triple bonds 
C) single, double, and triple bonds 
D) only single bonds 
E) only single and double bonds 
A) both single and double bonds 
B) double or triple bonds 
C) single, double, and triple bonds 
D) only single bonds 
E) only single and double bonds

Question 6

The phase diagram of a substance is shown above.The area labeled ________ indicates the liquid phase for the substance.

Accepted Answer

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

Question 7

The heating curve shown was generated by measuring the heat flow and temperature of a solid as it was heated.The heat flow into the sample in the segment ________ will yield the value of the ΔHfusion of this substance.

Accepted Answer

A) AB 
B) BC 
C) CD 
D) DE 
E) EF 
A) AB 
B) BC 
C) CD 
D) DE 
E) EF

Question 8

The intermolecular force(s)responsible for the fact that CH4 has the lowest boiling point in the set CH4,CH3CH3,CH3CH2CH3,CH3CH2CH2CH3 is/are ________.

Accepted Answer

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

Question 9

Which statements about viscosity are true?
(i)Viscosity increases as temperature decreases.
(ii)Viscosity increases as molecular weight increases.
(iii)Viscosity increases as intermolecular forces increase.

Accepted Answer

A) (i)only 
B) (ii)and (iii) 
C) (i)and (iii) 
D) none 
E) all 
A) (i)only 
B) (ii)and (iii) 
C) (i)and (iii) 
D) none 
E) all

Question 10

Based on the figure above,the boiling point of diethyl ether under an external pressure of   is ________ °C.

Accepted Answer

A) 40 
B) 10 
C) 30 
D) 20 
E) 0 
A) 40 
B) 10 
C) 30 
D) 20 
E) 0

Question 11

A volatile liquid is one that ________.

Accepted Answer

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

Question 12

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

Accepted Answer

A) CH4 
B) PCl3 
C) C2H5COOH 
D) LiCl 
E) Cl2S 
A) CH4 
B) PCl3 
C) C2H5COOH 
D) LiCl 
E) Cl2S

Question 13

Octane C8H18 molecules are held together by ________.

Accepted Answer

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

Question 14

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

Accepted Answer

A) HCl 
B) NH3 
C) H2O 
D) CH3OH 
E) None, all of the above exhibit dispersion forces. 
A) HCl 
B) NH3 
C) H2O 
D) CH3OH 
E) None, all of the above exhibit dispersion forces.

Question 15

Which molecule has the lowest boiling point?

Accepted Answer

A) CH3CH2CH2CH3 
B) CH3CH2CH3 
C) CH3CH3 
D) CH4 
E) H2O 
A) CH3CH2CH2CH3 
B) CH3CH2CH3 
C) CH3CH3 
D) CH4 
E) H2O

Question 16

What type(s)of intermolecular forces exist between Cl2 and CCl4?

Accepted Answer

A) dispersion forces and ion-dipole 
B) dispersion forces and dipole-dipole 
C) dispersion forces 
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 and ion-dipole 
B) dispersion forces and dipole-dipole 
C) dispersion forces 
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 17

The predominant intermolecular force in water is ________.

Accepted Answer

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

Question 18

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

Accepted Answer

A) HOCH2CH2CH2OH 
B) CH3CH2OH 
C) C4H10 
D) N2 
E) Cl2 
A) HOCH2CH2CH2OH 
B) CH3CH2OH 
C) C4H10 
D) N2 
E) Cl2

Question 19

All of the following are characteristics of liquid crystal behavior except ________.

Accepted Answer

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

Question 20

What are the common types of smectic liquid-crystalline phases?

Accepted Answer

A) A, C, and D 
B) A only 
C) A and C 
D) A and D 
E) C and D 
A) A, C, and D 
B) A only 
C) A and C 
D) A and D 
E) C and D

Exam 11: Liquids and Intermolecular Forces

According to the phase diagram shown above,what is the normal boiling point (°C)?

According to the phase diagram shown above,what is the normal melting point (°C)?

What types of intermolecular forces exist between CH3OH and H2O?

Together,liquids and solids constitute ________ phases of matter.

Molecules with ________ do not generally exhibit liquid-crystalline properties because they lack the rigidity necessary for alignment.

The phase diagram of a substance is shown above.The area labeled ________ indicates the liquid phase for the substance.

The heating curve shown was generated by measuring the heat flow and temperature of a solid as it was heated.The heat flow into the sample in the segment ________ will yield the value of the ΔHfusion of this substance.

The intermolecular force(s)responsible for the fact that CH4 has the lowest boiling point in the set CH4,CH3CH3,CH3CH2CH3,CH3CH2CH2CH3 is/are ________.

Which statements about viscosity are true? (i)Viscosity increases as temperature decreases. (ii)Viscosity increases as molecular weight increases. (iii)Viscosity increases as intermolecular forces increase.

Based on the figure above,the boiling point of diethyl ether under an external pressure of is ________ °C.

A volatile liquid is one that ________.

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

Octane C8H18 molecules are held together by ________.

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

Which molecule has the lowest boiling point?

What type(s)of intermolecular forces exist between Cl2 and CCl4?

The predominant intermolecular force in water is ________.

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

All of the following are characteristics of liquid crystal behavior except ________.

What are the common types of smectic liquid-crystalline phases?

Introduction: Matter, energy, and Measurement

Atoms, molecules, and Ions

Chemical Reactions and Reaction Stoichiometry

Reactions in Aqueous Solution

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 CH₃OH and H₂O?

The heating curve shown was generated by measuring the heat flow and temperature of a solid as it was heated.The heat flow into the sample in the segment ________ will yield the value of the ΔH_fusion of this substance.

The intermolecular force(s)responsible for the fact that CH₄ has the lowest boiling point in the set CH₄,CH₃CH₃,CH₃CH₂CH₃,CH₃CH₂CH₂CH₃ is/are ________.

Octane C₈H₁₈molecules are held together by ________.

What type(s)of intermolecular forces exist between Cl₂ and CCl₄?