Question 1

In cubic closest packing, the unit cell is body-centered cubic.

Accepted Answer

A) True 
 B)False

Question 2

The coordination number of sodium and chloride ions in the NaCl lattice, are, respectively

Accepted Answer

A)  10 and 10 
B)  8 and 8 
C)  6 and 6 
D)  4 and 4 
E)  None of these choices are correct. 
A)  10 and 10 
B)  8 and 8 
C)  6 and 6 
D)  4 and 4 
E)  None of these choices are correct.

Question 3

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

Question 4

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 5

Iron crystallizes in the body-centered cubic lattice. What is the coordination number for Fe?

Accepted Answer

A)  4 
B)  6 
C)  8 
D)  10 
E)  12 
A)  4 
B)  6 
C)  8 
D)  10 
E)  12

Question 6

A metal with a body-centered cubic lattice will have ______ atom(s) per unit cell.

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  9 
A)  1 
B)  2 
C)  3 
D)  4 
E)  9

Question 7

Which of the following terms refers to the resistance of a liquid to flow?

Accepted Answer

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

Question 8

Which one of the following substances does not exist in the indicated solid type?

Accepted Answer

A)  graphite - network 
B)  Na - metallic 
C)  SiO2 - molecular 
D)  NaCl - ionic 
E)  diamond - network 
A)  graphite - network 
B)  Na - metallic 
C)  SiO2 - molecular 
D)  NaCl - ionic 
E)  diamond - network

Question 9

Octane has a vapor pressure of 40. torr at 45.1°C and 400. torr at 104.0°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 are correct. 
A)  39.0 kJ/mol 
B)  46.0 kJ/mol 
C)  590 kJ/mol 
D)  710 kJ/mol 
E)  None of these choices are correct.

Question 10

What types of forces exist between molecules of CO2?

Accepted Answer

A)  hydrogen bonding only. 
B)  hydrogen bonding and dispersion forces. 
C)  dipole-dipole forces only. 
D)  dipole-dipole and dispersion forces. 
E)  dispersion forces only. 
A)  hydrogen bonding only. 
B)  hydrogen bonding and dispersion forces. 
C)  dipole-dipole forces only. 
D)  dipole-dipole and dispersion forces. 
E)  dispersion forces only.

Question 11

The surface tension of water is lowered when a detergent is present in solution.

Accepted Answer

A) True 
 B)False

Question 12

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

Accepted Answer

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

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

When the adhesive forces between a liquid and the walls of a capillary tube are greater than the cohesive forces within the liquid

Accepted Answer

A)  the liquid level in a capillary tube will rise above the surrounding liquid and the surface in the capillary tube will have a convex meniscus. 
B)  the liquid level in a capillary tube will rise above the surrounding liquid and the surface in the capillary tube will have a concave meniscus. 
C)  the liquid level in a capillary tube will drop below the surrounding liquid and the surface in the capillary tube will have a convex meniscus. 
D)  the liquid level in a capillary tube will drop below the surrounding liquid and the surface in the capillary tube will have a concave meniscus. 
E)  None of these choices are correct. 
A)  the liquid level in a capillary tube will rise above the surrounding liquid and the surface in the capillary tube will have a convex meniscus. 
B)  the liquid level in a capillary tube will rise above the surrounding liquid and the surface in the capillary tube will have a concave meniscus. 
C)  the liquid level in a capillary tube will drop below the surrounding liquid and the surface in the capillary tube will have a convex meniscus. 
D)  the liquid level in a capillary tube will drop below the surrounding liquid and the surface in the capillary tube will have a concave meniscus. 
E)  None of these choices are correct.

Question 15

When the electron cloud of a molecule is easily distorted, the molecule has a high

Accepted Answer

A)  polarity. 
B)  polarizability. 
C)  dipole moment. 
D)  van der Waals radius. 
E)  compressibility. 
A)  polarity. 
B)  polarizability. 
C)  dipole moment. 
D)  van der Waals radius. 
E)  compressibility.

Question 16

The highest temperature at which superconductivity has been achieved is approximately

Accepted Answer

A)  4 K. 
B)  30 K. 
C)  70 K. 
D)  100 K. 
E)  130 K. 
A)  4 K. 
B)  30 K. 
C)  70 K. 
D)  100 K. 
E)  130 K.

Question 17

The energy gap between the conduction band and the valence band is large for

Accepted Answer

A)  conductors. 
B)  semiconductors. 
C)  superconductors. 
D)  insulators. 
E)  alloys. 
A)  conductors. 
B)  semiconductors. 
C)  superconductors. 
D)  insulators. 
E)  alloys.

Question 18

Which one of the following quantities is generally not obtainable from a single heating or cooling curve of a substance, measured at atmospheric pressure?

Accepted Answer

A)  melting point 
B)  boiling point 
C)  triple point 
D)  heat of fusion 
E)  heat of vaporization 
A)  melting point 
B)  boiling point 
C)  triple point 
D)  heat of fusion 
E)  heat of vaporization

Question 19

When silicon is doped with an element from group 3A(13), the device/material produced is a/an

Accepted Answer

A)  intrinsic semiconductor. 
B)  p-type semiconductor. 
C)  n-type semiconductor. 
D)  p-n junction. 
E)  transistor. 
A)  intrinsic semiconductor. 
B)  p-type semiconductor. 
C)  n-type semiconductor. 
D)  p-n junction. 
E)  transistor.

Question 20

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

Accepted Answer

A)  C7H16, C5H12 
B)  CCl4, CBr4 
C)  H2O, H2S 
D)  CH3CH2OH, CH3-O-CH3 
E)  Xe, Kr 
A)  C7H16, C5H12 
B)  CCl4, CBr4 
C)  H2O, H2S 
D)  CH3CH2OH, CH3-O-CH3 
E)  Xe, Kr

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

In cubic closest packing, the unit cell is body-centered cubic.

The coordination number of sodium and chloride ions in the NaCl lattice, are, respectively

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

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

Iron crystallizes in the body-centered cubic lattice. What is the coordination number for Fe?

A metal with a body-centered cubic lattice will have ______ atom(s) per unit cell.

Which of the following terms refers to the resistance of a liquid to flow?

Which one of the following substances does not exist in the indicated solid type?

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

What types of forces exist between molecules of CO2?

The surface tension of water is lowered when a detergent is present in solution.

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

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

When the adhesive forces between a liquid and the walls of a capillary tube are greater than the cohesive forces within the liquid

When the electron cloud of a molecule is easily distorted, the molecule has a high

The highest temperature at which superconductivity has been achieved is approximately

The energy gap between the conduction band and the valence band is large for

Which one of the following quantities is generally not obtainable from a single heating or cooling curve of a substance, measured at atmospheric pressure?

When silicon is doped with an element from group 3A(13), the device/material produced is a/an

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

Keys to Studying Chemistry Definitions, Units, and Problem Solving

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 Reaction Direction

Electrochemistry Chemical Change and Electrical Work

The Elements in Nature and Industry

Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

What types of forces exist between molecules of CO₂?