Ch. 14 Prep-Test per 4
Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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The intermolecular forces between particles in a liquid can involve all of the
following except
a. | London dispersion forces. | c. | dipole-dipole
attractions. | b. | gravitational forces. | d. | hydrogen bonding. |
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2.
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The compressibility of a liquid is generally
a. | less than that of a gas. | c. | equal to that of a
gas. | b. | more than that of a gas. | d. | zero. |
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3.
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The attractive forces in a liquid are
a. | strong enough to prevent the particles from changing positions. | b. | too weak to hold the
particles in fixed positions. | c. | more effective than those in a
solid. | d. | as strong as covalent bonds. |
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4.
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What causes particles in a liquid to escape into a gas state?
a. | high kinetic energy | c. | surface tension | b. | a freezing temperature | d. | the combining of
liquids |
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5.
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A solid forms when the average energy of a substance's particles
a. | increases. | c. | decreases then increases. | b. | decreases. | d. | creates a disorderly arrangement. |
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6.
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In general, most substances are
a. | least dense in the liquid state. | c. | less dense as solids than as
liquids. | b. | more dense as gases than as solids. | d. | most dense in the solid
state. |
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7.
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What causes the high density of solids?
a. | The particles are more massive than those in liquids. | b. | The intermolecular
forces between particles are weak. | c. | The particles are packed closely
together. | d. | The energy of the particles is very high. |
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8.
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Which of the following is a crystalline solid?
a. | a plastic milk container | c. | a glass bottle | b. | a quartz
rock | d. | a three-dimensional
glass cube |
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9.
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Which substance's solid state consists of covalent molecular
crystals?
a. | salt | c. | sodium | b. | water | d. | diamond |
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10.
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Whenever a liquid changes to a vapor, it
a. | absorbs heat energy from its surroundings. | b. | is in equilibrium
with its vapor. | c. | is boiling. | d. | is condensing. |
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11.
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Molecules at the surface of a liquid can enter the vapor phase only if
a. | equilibrium has not been reached. | b. | the concentration of the vapor is
zero. | c. | their energy is high enough to overcome the attractive forces in the
liquid. | d. | condensation is not occurring. |
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12.
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A volatile liquid
a. | has strong attractive forces between particles. | b. | evaporates
readily. | c. | has an odor. | d. | is ionic. |
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13.
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At pressures greater than 760 mm Hg, water will boil at
a. | a temperature higher than 100ºC. | c. | 100ºC. | b. | a temperature lower
than 100ºC. | d. | 4ºC. |
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14.
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Why would a camper near the top of Mt. Everest find that water boils at less
than 100ºC?
a. | There is greater atmospheric pressure than at sea level. | b. | The flames are
hotter at that elevation. | c. | There is less atmospheric pressure than at sea
level. | d. | The atmosphere has less moisture. |
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15.
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A metal solution is a(n)
a. | colloid. | c. | suspension. | b. | alloy. | d. | electrolyte. |
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16.
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What causes water's low vapor pressure?
a. | London dispersion Forces | c. | hydrogen
bonding | b. | covalent bonding | d. | ionic attractions |
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17.
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During a phase change, the temperature of a substance ____.
a. | increases | c. | may increase or decrease | b. | remains
constant | d. | decreases |
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18.
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In a metallic bond, electrons are _____________ .
a. | held tightly | c. | held loosely and flow freely | b. | not
shared | d. | paired
evenly |
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19.
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What is going on in the area between D and E?
a. | melting | c. | condensing | b. | boiling | d. | freezing |
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20.
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What phase(s) of matter are present between C and D?
a. | Solid | c. | Liquid | b. | Liquid and Solid | d. | Liquid and Gas |
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21.
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Which of the following is true about ionic crystals?
a. | They are polar. | c. | They consist of molecules held together by intermolecular
forces. | b. | They are atomic solids. | d. | Their structure consists of positive and negative ions arranged in a regular
pattern. |
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22.
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Liquid in a sealed container kept at constant pressure will show no change in
its vapor pressure. Why is this?
a. | particles stay in the liquid form and do not vaporize into gas | c. | gas particles above
the liquid do not condense into liquid | b. | liquid and gas particles are condensing and
vaporizing at the same rate producing an equilibrium | d. | none of these |
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Matching
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Match each statement with the correct item below. a. | E needed to melt 1 mol of a substance | b. | shifting of electrons causing an instantaneous,
weak, short-lived dipole | c. | NF...NF | d. | hydrogen
bond | e. | E needed to turn 1 mol of a liquid to a gas | f. | general name for
forces between molecules | g. | a mixture of metal atoms | h. | solid with a
particular arrangement of components |
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23.
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Molar heat of fusion
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24.
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Dipole-dipole attraction
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25.
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O - H.....O - H
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26.
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Molar heat of vaporization
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27.
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London dispersion forces
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28.
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Intermolecular forces
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29.
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Crystalline solid
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30.
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Alloy
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