Question 1

Which of the following forces between atoms or ions or molecules is the strongest on a per mole basis?

Accepted Answer

A)  Force holding one sheet of graphite to another 
B)  Covalent bond 
C)  Dipole-dipole force 
D)  Hydrogen bond 
E)  Dispersion force 
A)  Force holding one sheet of graphite to another 
B)  Covalent bond 
C)  Dipole-dipole force 
D)  Hydrogen bond 
E)  Dispersion force

Question 2

Exhibit 11-2 The phase diagram below is needed for the following question(s).  
Refer to Exhibit 11-2. Which point denotes the place where all the three phases are in equilibrium at the same time?

Accepted Answer

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

Question 3

Which intermolecular forces of attraction represents an interaction between two molecules resulting from opposites charges (partial positive and partial negative interactions)?
I. London dispersion
II. Dipole-dipole
III. Hydrogen bonding

Accepted Answer

A)  I only 
B)  II only 
C)  III only 
D)  I and II 
E)  All of these 
A)  I only 
B)  II only 
C)  III only 
D)  I and II 
E)  All of these

Question 4

Which crystal packing structure listed below provides an "ABA" closest packing arrangement for the different layers of metal spheres?

Accepted Answer

A)  Hexagonal Close pack 
B)  Face Centered Cubic 
C)  Body Centered Cubic 
D)  Primitive Cubic 
E)  None of these 
A)  Hexagonal Close pack 
B)  Face Centered Cubic 
C)  Body Centered Cubic 
D)  Primitive Cubic 
E)  None of these

Question 5

The property of a liquid that measures its resistance to flowing is:

Accepted Answer

A)  enthalpy of vaporization. 
B)  viscosity. 
C)  surface tension. 
D)  vapor pressure. 
E)  none of these 
A)  enthalpy of vaporization. 
B)  viscosity. 
C)  surface tension. 
D)  vapor pressure. 
E)  none of these

Question 6

Exhibit 11-3 Consider the General Phase Diagram shown below to answer the following problem(s).  
-Refer to Exhibit 11-3. Which transition is related to sublimation in the phase diagram above?

Accepted Answer

A)  Moving from point A to point B 
B)  Moving from point B to point A 
C)  Moving from point B to point C 
D)  Moving from point C to point B 
E)  None of these. 
A)  Moving from point A to point B 
B)  Moving from point B to point A 
C)  Moving from point B to point C 
D)  Moving from point C to point B 
E)  None of these.

Question 7

Calcium fluoride, CaF2, has a unit cell with the Ca2+ ions in a face-centered cubic arrangement. How many fluoride ions are present in the unit cell?

Accepted Answer

A)  28 
B)  2 
C)  8 
D)  4 
E)  none of these 
A)  28 
B)  2 
C)  8 
D)  4 
E)  none of these

Question 8

Exhibit 11-2 The phase diagram below is needed for the following question(s).  
Refer to Exhibit 11-2. If one is at position F and the pressure is increased, which statement below is true?

Accepted Answer

A)  One moves from a position of gas-liquid equilibrium to one in the liquid phase. 
B)  One moves from a position of gas-solid equilibrium to one in the liquid phase. 
C)  One moves from the gas phase to the liquid phase. 
D)  One moves from a position of gas-liquid equilibrium to one in the gas phase. 
E)  none of these 
A)  One moves from a position of gas-liquid equilibrium to one in the liquid phase. 
B)  One moves from a position of gas-solid equilibrium to one in the liquid phase. 
C)  One moves from the gas phase to the liquid phase. 
D)  One moves from a position of gas-liquid equilibrium to one in the gas phase. 
E)  none of these

Question 9

The basic repeating three-dimensional pattern of a solid is known as the:

Accepted Answer

A)  Bragg cell 
B)  closest packing 
C)  covalent network 
D)  unit cell 
E)  none of these 
A)  Bragg cell 
B)  closest packing 
C)  covalent network 
D)  unit cell 
E)  none of these

Question 10

Exhibit 11-4 Consider Aluminum metal that crystallizes in a face centered cubic cell to answer the following problem(s). The atomic radius of an aluminum atom is 1.43 . One face of this unit cell is shown in the diagram below.  
-Refer to Exhibit 11-4. How many aluminum atoms are present in a single face centered unit cell?

Accepted Answer

A)  1 Al atom 
B)  2 Al atoms 
C)  4 Al atoms 
D)  8 Al atoms 
E)  12 Al atoms 
A)  1 Al atom 
B)  2 Al atoms 
C)  4 Al atoms 
D)  8 Al atoms 
E)  12 Al atoms

Question 11

At what angle are x-rays with a wavelength of 175 pm diffracted by layers of atoms that are 353 pm apart?
(Assume n = 1)

Accepted Answer

A)  14.4 ° 
B)  29.7 ° 
C)  60.3 ° 
D)  75.6 ° 
E)  none of these 
A)  14.4 ° 
B)  29.7 ° 
C)  60.3 ° 
D)  75.6 ° 
E)  none of these

Question 12

A copper crystal is classified as:

Accepted Answer

A)  ionic 
B)  molecular 
C)  covalent network 
D)  metallic 
E)  none of these 
A)  ionic 
B)  molecular 
C)  covalent network 
D)  metallic 
E)  none of these

Question 13

Exhibit 11-2 The phase diagram below is needed for the following question(s).  
Refer to Exhibit 11-2. If one is at position A and the pressure is increased, which statement below is true?

Accepted Answer

A)  One moves from a position of gas-liquid equilibrium to one in the liquid phase. 
B)  One moves from the gas phase to the liquid phase. 
C)  One moves from a position of gas-solid equilibrium to one in the liquid phase. 
D)  One moves from a position of gas-liquid equilibrium to one in the gas phase. 
E)  One moves from a position of gas-solid equilibrium to one in the solid phase. 
A)  One moves from a position of gas-liquid equilibrium to one in the liquid phase. 
B)  One moves from the gas phase to the liquid phase. 
C)  One moves from a position of gas-solid equilibrium to one in the liquid phase. 
D)  One moves from a position of gas-liquid equilibrium to one in the gas phase. 
E)  One moves from a position of gas-solid equilibrium to one in the solid phase.

Question 14

A crystal diffracts x-rays (£ = 154 pm) at an angle of 16.4 ° . What is the spacing between the layers of atoms that produced this diffraction?
(Assume the order of diffraction is one.)

Accepted Answer

A)  22 pm 
B)  74 pm 
C)  80 pm 
D)  273 pm 
E)  none of these 
A)  22 pm 
B)  74 pm 
C)  80 pm 
D)  273 pm 
E)  none of these

Question 15

For most substances, the enthalpy of the phase changes, D H sublimation, D H fusion, and D H vaporization, increase in the order:

Accepted Answer

A)  D H sublimation D H fusion D H vaporization 
B)  D H fusion D H sublimation D H vaporization 
C)  D H fusion D H vaporization D H sublimation 
D)  D H vaporization D H fusion D H sublimation 
E)  D H vaporization D H sublimation D H fusion 
A)  D H sublimation D H fusion D H vaporization 
B)  D H fusion D H sublimation D H vaporization 
C)  D H fusion D H vaporization D H sublimation 
D)  D H vaporization D H fusion D H sublimation 
E)  D H vaporization D H sublimation D H fusion

Question 16

On the basis of intermolecular forces of attraction, rank the following three compounds in terms of increasing boiling point . NH3 (Ammonia), N2 (Nitrogen) and HCl (Hydrogen Chloride)

Accepted Answer

A)  (lowest bp) Ammonia < Hydrogen chloride < Nitrogen (highest bp) 
B)  (lowest bp) Ammonia < Nitrogen < Hydrogen chloride (highest bp) 
C)  (lowest bp) Nitrogen < Hydrogen chloride < Ammonia (highest bp) 
D)  (lowest bp) Nitrogen < Ammonia < Hydrogen chloride (highest bp) 
E)  (lowest bp) Hydrogen chloride < Nitrogen < Ammonia (highest bp) 
A)  (lowest bp) Ammonia < Hydrogen chloride < Nitrogen (highest bp) 
B)  (lowest bp) Ammonia < Nitrogen < Hydrogen chloride (highest bp) 
C)  (lowest bp) Nitrogen < Hydrogen chloride < Ammonia (highest bp) 
D)  (lowest bp) Nitrogen < Ammonia < Hydrogen chloride (highest bp) 
E)  (lowest bp) Hydrogen chloride < Nitrogen < Ammonia (highest bp)

Question 17

Which crystal packing structure listed below provides an "ABC" closest packing arrangement for the different layers of metal spheres?

Accepted Answer

A)  Hexagonal Close pack 
B)  Face Centered Cubic 
C)  Body Centered Cubic 
D)  Primitive Cubic 
E)  None of these 
A)  Hexagonal Close pack 
B)  Face Centered Cubic 
C)  Body Centered Cubic 
D)  Primitive Cubic 
E)  None of these

Question 18

Which unit cell(s) provide(s) a coordination number of 12 for each atom in the lattice?

Accepted Answer

A)  Hexagonal 
B)  Face Centered Cubic 
C)  Body Centered cubic 
D)  a and b 
E)  all of these 
A)  Hexagonal 
B)  Face Centered Cubic 
C)  Body Centered cubic 
D)  a and b 
E)  all of these

Question 19

Exhibit 11-3 Consider the General Phase Diagram shown below to answer the following problem(s).  
-Refer to Exhibit 11-3. What temperature-pressure point on the General Phase Diagram above represents the Critical Point ?

Accepted Answer

A)  D 
B)  E 
C)  F 
D)  G 
E)  H 
A)  D 
B)  E 
C)  F 
D)  G 
E)  H

Question 20

Which of the following forces between atoms or ions or molecules is the strongest?

Accepted Answer

A)  Electrostatic force between ions 
B)  Ion-dipole force 
C)  Dipole-dipole force 
D)  London dispersion force 
E)  Hydrogen bonding 
A)  Electrostatic force between ions 
B)  Ion-dipole force 
C)  Dipole-dipole force 
D)  London dispersion force 
E)  Hydrogen bonding

Exam 11: Liquids and Solids

Which of the following forces between atoms or ions or molecules is the strongest on a per mole basis?

Exhibit 11-2 The phase diagram below is needed for the following question(s). Refer to Exhibit 11-2. Which point denotes the place where all the three phases are in equilibrium at the same time?

Which intermolecular forces of attraction represents an interaction between two molecules resulting from opposites charges (partial positive and partial negative interactions)? I. London dispersion II. Dipole-dipole III. Hydrogen bonding

Which crystal packing structure listed below provides an "ABA" closest packing arrangement for the different layers of metal spheres?

The property of a liquid that measures its resistance to flowing is:

Exhibit 11-3 Consider the General Phase Diagram shown below to answer the following problem(s). -Refer to Exhibit 11-3. Which transition is related to sublimation in the phase diagram above?

Calcium fluoride, CaF2, has a unit cell with the Ca2+ ions in a face-centered cubic arrangement. How many fluoride ions are present in the unit cell?

Exhibit 11-2 The phase diagram below is needed for the following question(s). Refer to Exhibit 11-2. If one is at position F and the pressure is increased, which statement below is true?

The basic repeating three-dimensional pattern of a solid is known as the:

At what angle are x-rays with a wavelength of 175 pm diffracted by layers of atoms that are 353 pm apart? (Assume n = 1)

A copper crystal is classified as:

Exhibit 11-2 The phase diagram below is needed for the following question(s). Refer to Exhibit 11-2. If one is at position A and the pressure is increased, which statement below is true?

A crystal diffracts x-rays (£ = 154 pm) at an angle of 16.4 ° . What is the spacing between the layers of atoms that produced this diffraction? (Assume the order of diffraction is one.)

For most substances, the enthalpy of the phase changes, D H sublimation, D H fusion, and D H vaporization, increase in the order:

On the basis of intermolecular forces of attraction, rank the following three compounds in terms of increasing boiling point . NH3 (Ammonia), N2 (Nitrogen) and HCl (Hydrogen Chloride)

Which crystal packing structure listed below provides an "ABC" closest packing arrangement for the different layers of metal spheres?

Which unit cell(s) provide(s) a coordination number of 12 for each atom in the lattice?

Exhibit 11-3 Consider the General Phase Diagram shown below to answer the following problem(s). -Refer to Exhibit 11-3. What temperature-pressure point on the General Phase Diagram above represents the Critical Point ?

Which of the following forces between atoms or ions or molecules is the strongest?

Introduction to Chemistry

Atoms, Molecules, and Ions

Equations, the Mole, and Chemical Formulas

Chemical Reactions in Solution

Thermochemistry

The Gaseous State

Electronic Structure

The Periodic Table: Structure and Trends

Chemical Bonds

Molecular Structure and Bonding Theories

Solutions

Chemical Kinetics

Chemical Equilibrium

Solutions of Acids and Bases

Reactions Between Acids and Bases

Chemical Thermodynamics

Electrochemistry

Transition Metals, Coordination Chemistry and Metallurgy

The Chemistry of Hydrogen, Elements in Groups 3A Through 6A, and the Noble Gases

Nuclear Chemistry

Organic Chemistry and Biochemistry

Filters

Calcium fluoride, CaF₂, has a unit cell with the Ca²⁺ ions in a face-centered cubic arrangement. How many fluoride ions are present in the unit cell?

For most substances, the enthalpy of the phase changes, D H _sublimation, D H _fusion, and D H _vaporization, increase in the order:

On the basis of intermolecular forces of attraction, rank the following three compounds in terms of increasing boiling point . NH₃ (Ammonia), N₂ (Nitrogen) and HCl (Hydrogen Chloride)