Question 1

Which of the following pairs of molecules can form hydrogen bonds between them?

Accepted Answer

A)  HCl and HI 
B)  CH3OH and NH3 
C)  CH4 and H2O 
D)  SO2 and CH2O 
E)  H2 and O2 
A)  HCl and HI 
B)  CH3OH and NH3 
C)  CH4 and H2O 
D)  SO2 and CH2O 
E)  H2 and O2 B

Question 2

In the packing of identical atoms with cubic unit cells, the packing efficiency increases as the coordination number increases.

Accepted Answer

A) True 
 B)False  True

Question 3

Crystal structures may be conveniently measured using

Accepted Answer

A)  X-ray diffraction. 
B)  infrared spectroscopy. 
C)  ultraviolet-visible spectroscopy. 
D)  microwave spectroscopy. 
E)  magnetic resonance imaging. 
A)  X-ray diffraction. 
B)  infrared spectroscopy. 
C)  ultraviolet-visible spectroscopy. 
D)  microwave spectroscopy. 
E)  magnetic resonance imaging. A

Question 4

The phase diagram of a substance can be used to obtain the vapor pressure of that substance at a given temperature.

Accepted Answer

A) True 
 B)False

Question 5

Mercury melts at -39$\degree$C and boils at 357$\degree$C. Draw a diagram of the heating curve of mercury. Label all lines and axes, and clearly indicate the melting and boiling points on your diagram.

Accepted Answer

The answer of Mercury melts at -39$\degree$C and boils at...

Question 6

A single water molecule can participate in at most two hydrogen bonds at any instant.

Accepted Answer

A) True 
 B)False

Question 7

Liquid crystal displays are most commonly constructed of smectic type liquid crystals.

Accepted Answer

A) True 
 B)False

Question 8

The energy of a hydrogen bond is greater than that of a typical covalent bond.

Accepted Answer

A) True 
 B)False

Question 9

Which of the following properties measures the energy needed to increase the surface area of a liquid?

Accepted Answer

A)  capillary action 
B)  surface tension 
C)  viscosity 
D)  cohesion 
E)  specific elasticity 
A)  capillary action 
B)  surface tension 
C)  viscosity 
D)  cohesion 
E)  specific elasticity

Question 10

Ceramic superconductors often contain copper in unusual oxidation states.

Accepted Answer

A) True 
 B)False

Question 11

Octane has a vapor pressure of 40. torr at 45.1$\degree$C and 400. torr at 104.0$\degree$C. What is its heat of vaporization?

Accepted Answer

A)  39.0 kJ/mol 
B)  46.0 kJ/mol 
C)  590 kJ/mol 
D)  710 kJ/mol 
E)  None of these choices is correct. 
A)  39.0 kJ/mol 
B)  46.0 kJ/mol 
C)  590 kJ/mol 
D)  710 kJ/mol 
E)  None of these choices is correct.

Question 12

Which of the following pairs is arranged with the particle of higher polarizability listed first?

Accepted Answer

A)  CCl4, CI4 
B)  H2O, H2Se 
C)  C6H14, C4H10 
D)  NH3, NF3 
E)  None of these choices is correct. 
A)  CCl4, CI4 
B)  H2O, H2Se 
C)  C6H14, C4H10 
D)  NH3, NF3 
E)  None of these choices is correct.

Question 13

If the solid form of a pure substance is denser than its liquid form, an increase in pressure will cause the melting point to decrease.

Accepted Answer

A) True 
 B)False

Question 14

In a transistor, the current through one semiconductor junction controls the current through a neighboring junction.

Accepted Answer

A) True 
 B)False

Question 15

A cubic unit cell has an edge length of 400. pm. The length of its body diagonal (internal diagonal) in pm is therefore:

Accepted Answer

A)  512 
B)  566 
C)  631 
D)  693 
E)  724 
A)  512 
B)  566 
C)  631 
D)  693 
E)  724

Question 16

Select the pair of substances in which the one with the lower vapor pressure at a given temperature is listed first.

Accepted Answer

A)    and CH3CH2CH2OH 
B)  PH3 and NH3 
C)  CF4 and CBr4 
D)  C3H8 and C4H10 
E)  F2 and Cl2 
A)    and CH3CH2CH2OH 
B)  PH3 and NH3 
C)  CF4 and CBr4 
D)  C3H8 and C4H10 
E)  F2 and Cl2

Question 17

Which of the following should have the highest surface tension at a given temperature?

Accepted Answer

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

Question 18

Neon atoms are attracted to each other by

Accepted Answer

A)  dipole-dipole forces. 
B)  London dispersion forces. 
C)  hydrogen bonding. 
D)  covalent bonding. 
E)  intramolecular forces. 
A)  dipole-dipole forces. 
B)  London dispersion forces. 
C)  hydrogen bonding. 
D)  covalent bonding. 
E)  intramolecular forces.

Question 19

For the solid forms of the following elements, which one is most likely to be of the molecular type?

Accepted Answer

A)  Xe 
B)  C 
C)  Pb 
D)  S 
E)  Cr 
A)  Xe 
B)  C 
C)  Pb 
D)  S 
E)  Cr

Question 20

Which of the following liquids is likely to have the highest surface tension?

Accepted Answer

A)  Br2 
B)  C8H18 
C)  CH3OCH3 
D)  CH3OH 
E)  Pb 
A)  Br2 
B)  C8H18 
C)  CH3OCH3 
D)  CH3OH 
E)  Pb

Exam 12: Intermolecular Forces: Liquids, Solids, and Phase Changes

Which of the following pairs of molecules can form hydrogen bonds between them?

In the packing of identical atoms with cubic unit cells, the packing efficiency increases as the coordination number increases.

Crystal structures may be conveniently measured using

The phase diagram of a substance can be used to obtain the vapor pressure of that substance at a given temperature.

Mercury melts at -39 °\degree° C and boils at 357 °\degree° C. Draw a diagram of the heating curve of mercury. Label all lines and axes, and clearly indicate the melting and boiling points on your diagram.

A single water molecule can participate in at most two hydrogen bonds at any instant.

Liquid crystal displays are most commonly constructed of smectic type liquid crystals.

The energy of a hydrogen bond is greater than that of a typical covalent bond.

Which of the following properties measures the energy needed to increase the surface area of a liquid?

Ceramic superconductors often contain copper in unusual oxidation states.

Octane has a vapor pressure of 40. torr at 45.1 °\degree° C and 400. torr at 104.0 °\degree° C. What is its heat of vaporization?

Which of the following pairs is arranged with the particle of higher polarizability listed first?

If the solid form of a pure substance is denser than its liquid form, an increase in pressure will cause the melting point to decrease.

In a transistor, the current through one semiconductor junction controls the current through a neighboring junction.

A cubic unit cell has an edge length of 400. pm. The length of its body diagonal (internal diagonal) in pm is therefore:

Select the pair of substances in which the one with the lower vapor pressure at a given temperature is listed first.

Which of the following should have the highest surface tension at a given temperature?

Neon atoms are attracted to each other by

For the solid forms of the following elements, which one is most likely to be of the molecular type?

Which of the following liquids is likely to have the highest surface tension?

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

Mercury melts at -39 $\degree$ C and boils at 357 $\degree$ C. Draw a diagram of the heating curve of mercury. Label all lines and axes, and clearly indicate the melting and boiling points on your diagram.

Octane has a vapor pressure of 40. torr at 45.1 $\degree$ C and 400. torr at 104.0 $\degree$ C. What is its heat of vaporization?