Question 1

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.F) C) and E)
G) A) and B)

Question 2

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

Accepted Answer

A)  HOCH2CH2CH2OH
B)  CH3CH2OH
C)  C4H10
D)  N2
E)  Cl2F) D) and E)
G) None of the above

Question 3

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

Accepted Answer

A)  CH4
B)  PCl3
C)  C2H5COOH
D)  LiCl
E)  Cl2SF) A) and B)
G) A) and C)

Question 4

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 bondsF) None of the above
G) B) and C)

Question 5

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 groupsF) A) and B)
G) B) and D)

Question 6

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 interactionsF) A) and E)
G) C) and E)

Question 7

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 evaporatesF) B) and E)
G) A) and D)

Question 8

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 zF) C) and E)
G) D) and E)

Question 9

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 bondingF) All of the above
G) B) and E)

Question 10

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)  EFF) C) and D)
G) A) and B)

Question 11

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.F) A) and B)
G) A) and E)

Question 12

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)  allF) A) and B)
G) A) and E)

Question 13

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-dipoleF) A) and D)
G) C) and D)

Question 14

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 interactionsF) A) and C)
G) All of the above

Question 15

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 DF) B) and D)
G) A) and E)

Question 16

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)  0F) All of the above
G) B) and E)

Question 17

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)  50F) B) and C)
G) A) and D)

Question 18

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 disorderedF) All of the above
G) A) and E)

Question 19

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)  29F) B) and D)
G) A) and D)

Question 20

Which molecule has the lowest boiling point?

Accepted Answer

A)  CH3CH2CH2CH3
B)  CH3CH2CH3
C)  CH3CH3
D)  CH4
E)  H2OF) None of the above
G) A) and D)

Exam 11: Liquids and Intermolecular Forces

The predominant intermolecular force in water is ________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What types of intermolecular forces exist between CH3OH and H2O?

Correct AnswerverifiedShow Answer

Octane C8H18 molecules are held together by ________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Together,liquids and solids constitute ________ phases of matter.

Correct AnswerverifiedShow Answer

A volatile liquid is one that ________.

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which molecule has the lowest boiling point?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

What types of intermolecular forces exist between CH₃OH and H₂O?

Correct Answer
verified

Octane C₈H₁₈molecules are held together by ________.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified