Question 1

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

Accepted Answer

A)  15
B)  25
C)  35
D)  45
E)  55 A

Question 2

What is the predominant intermolecular force in CH4?

Accepted Answer

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

Question 3

In the ________ liquid crystalline phase, the component molecules are aligned along their long axis and are arranged in layers with the molecules in each plane twisted slightly in relation to the molecules in the planes above and below.

Accepted Answer

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

Question 4

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

Question 5

-The heating curve shown was generated by measuring the heat flow and temperature for a solid as it was heated. The slope of the ________ segment corresponds to the heat capacity of the solid.

Accepted Answer

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

Question 6

Which one of the following substances will have hydrogen bonding as one of its intermolecular forces?

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 7

Based on the following information, which compound has the strongest intermolecular forces? Substance ΔHvap (kJ/mol)
Argon (Ar)6.3
Benzene (C6H6)31.0
Ethanol (C2H5OH)39.3
Water (H2O)40.8
Methane (CH4)9.2

Accepted Answer

A)  Argon
B)  Benzene
C)  Ethanol
D)  Water
E)  Methane

Question 8

Which type of liquid crystal is colored and changes color with temperature?

Accepted Answer

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

Question 9

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 10

In general, intramolecular forces determine the ________ properties of a substance and intermolecular forces determine its ________ properties.

Accepted Answer

The answer of In general, intramolecular forces determine the ________...

Question 11

-The heating curve shown was generated by measuring the heat flow and temperature for a solid as it was heated. The slope of the ________ segment corresponds to the heat capacity of the gas.

Accepted Answer

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

Question 12

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

Question 13

With what compound will NH3 experience only ion-dipole intermolecular forces?

Accepted Answer

A)  LiCl
B)  SiH4
C)  CH3I
D)  C3H7OH
E)  OCl2

Question 14

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

Accepted Answer

A)  NH3
B)  H2O
C)  C3H7OH
D)  HOCH2CH2OH
E)  None, all of the above exhibit dispersion forces.

Question 15

-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

Question 16

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

Question 17

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

Accepted Answer

A)  CF4
B)  SnF3
C)  C4H9OH
D)  HCl
E)  F2O

Question 18

What types of intermolecular forces exist between HI and H2S?

Accepted Answer

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

Question 19

C12H26 molecules are held together by ________.

Accepted Answer

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

Question 20

The predominant intermolecular force in CaBr2 is ________.

Accepted Answer

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

Exam 11: Liquids and Intermolecular Forces

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

What is the predominant intermolecular force in CH₄?

In the ________ liquid crystalline phase, the component molecules are aligned along their long axis and are arranged in layers with the molecules in each plane twisted slightly in relation to the molecules in the planes above and below.

A volatile liquid is one that ________.

-The heating curve shown was generated by measuring the heat flow and temperature for a solid as it was heated. The slope of the ________ segment corresponds to the heat capacity of the solid.

Which one of the following substances will have hydrogen bonding as one of its intermolecular forces?

Based on the following information, which compound has the strongest intermolecular forces? Substance ΔH_vap (kJ/mol) Argon (Ar) 6.3 Benzene (C₆H₆) 31.0 Ethanol (C₂H₅OH) 39.3 Water (H₂O) 40.8 Methane (CH₄) 9.2

Which type of liquid crystal is colored and changes color with temperature?

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.

In general, intramolecular forces determine the properties of a substance and intermolecular forces determine its properties.

-The heating curve shown was generated by measuring the heat flow and temperature for a solid as it was heated. The slope of the ________ segment corresponds to the heat capacity of the gas.

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

With what compound will NH₃ experience only ion-dipole intermolecular forces?

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

-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.

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.

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

What types of intermolecular forces exist between HI and H₂S?

C₁₂H₂₆ molecules are held together by ________.

The predominant intermolecular force in CaBr₂ is ________.

Exam 11: Liquids and Intermolecular Forces

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

What is the predominant intermolecular force in CH4?

In the ________ liquid crystalline phase, the component molecules are aligned along their long axis and are arranged in layers with the molecules in each plane twisted slightly in relation to the molecules in the planes above and below.

A volatile liquid is one that ________.

-The heating curve shown was generated by measuring the heat flow and temperature for a solid as it was heated. The slope of the ________ segment corresponds to the heat capacity of the solid.

Which one of the following substances will have hydrogen bonding as one of its intermolecular forces?

Based on the following information, which compound has the strongest intermolecular forces? Substance ΔHvap (kJ/mol) Argon (Ar) 6.3 Benzene (C6H6) 31.0 Ethanol (C2H5OH) 39.3 Water (H2O) 40.8 Methane (CH4) 9.2

Which type of liquid crystal is colored and changes color with temperature?

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.

In general, intramolecular forces determine the ________ properties of a substance and intermolecular forces determine its ________ properties.

-The heating curve shown was generated by measuring the heat flow and temperature for a solid as it was heated. The slope of the ________ segment corresponds to the heat capacity of the gas.

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

With what compound will NH3 experience only ion-dipole intermolecular forces?

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

-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.

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.

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

What types of intermolecular forces exist between HI and H2S?

C12H26 molecules are held together by ________.

The predominant intermolecular force in CaBr2 is ________.

What is the predominant intermolecular force in CH₄?

Based on the following information, which compound has the strongest intermolecular forces? Substance ΔH_vap (kJ/mol) Argon (Ar) 6.3 Benzene (C₆H₆) 31.0 Ethanol (C₂H₅OH) 39.3 Water (H₂O) 40.8 Methane (CH₄) 9.2

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.

In general, intramolecular forces determine the properties of a substance and intermolecular forces determine its properties.

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

With what compound will NH₃ experience only ion-dipole intermolecular forces?

-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.

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.

What types of intermolecular forces exist between HI and H₂S?

C₁₂H₂₆ molecules are held together by ________.

The predominant intermolecular force in CaBr₂ is ________.