True/False
Indicate whether the sentence or statement is true
or false.
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1.
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When water
dissolves sugar, the positive ends of the water molecules are attracted to the negative ends of the
sugar molecules.
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2.
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Particles of
liquids and gases move much more freely than do particles of solids.
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3.
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The
dissolving process for solid solutions occurs in a solid state.
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4.
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Salad oil
dissolves readily in vinegar.
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5.
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Oil-based
paints, nail polish, and iodine are examples of polar solutes.
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6.
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Water can be
used to dissolve nonpolar molecules.
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7.
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Vitamin C
has several oxygen-to-hydrogen bonds resembling those found in water, making Vitamin C
polar.
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8.
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Nonpolar
materials have separated positive and negative areas.
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9.
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In
hydrocarbons, carbon and hydrogen atoms share electrons in a nearly equal manner.
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10.
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The
concentration of a liquid solution can be expressed in terms of the percentage by volume of the
solute.
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11.
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A drink
advertised as having 10% fruit juice has a concentration of 100% by volume of the fruit
juice.
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Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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12.
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In a
solution, the substance that is being dissolved is the ____. a. | gas | c. | solute | b. | liquid | d. | solvent | | | | |
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13.
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The oceans
are an example of a(n) ____ solution. a. | alloy | c. | liquid | b. | gaseous | d. | solid | | | | |
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14.
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A substance
that does NOT conduct an electric current when it forms a solution is a(n) ____. a. | electrolyte | c. | liquid | b. | nonelectrolyte | d. | solid | | | | |
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15.
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A solution
that contains all of the solute it can hold at a given temperature is ____. a. | diluted | c. | supersaturated | b. | saturated | d. | unsaturated | | | | |
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16.
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The process
by which the positive and negative ions of a crystalline solid separate in water is called
____. a. | dissociation | c. | solution | b. | ionization | d. | saturation | | | | |
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17.
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Increasing
the surface area of a solid ____. a. | causes the solid to ionize | c. | slows the rate of solution | b. | has no effect on the
rate of solution | d. | speeds the rate of
solution | | | | |
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18.
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When a gas
is dissolved in a liquid, the gas dissolves faster if the liquid is ____. a. | cooled | c. | heated | b. | an electrolyte | d. | under low pressure | | | | |
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19.
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The
concentration of solution that contains a large amount of solute in the solvent could be described as
____. a. | concentrated | c. | polar | b. | diluted | d. | unsaturated | | | | |
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20.
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An alloy is
an example of a ____ solution. a. | dilute | c. | liquid | b. | gaseous | d. | solid | | | | |
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21.
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Adding more
solute to a solvent ____. a. | decreases its boiling point | c. | increases its boiling point | b. | does not affect its
boiling point | d. | increases its freezing
point | | | | |
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22.
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A molecule
that is positively charged on one end and negatively charged on the other end is
____. a. | a
hydrocarbon | c. | polar | b. | nonpolar | d. | radioactive | | | | |
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23.
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The amount
of solute that can be dissolved in a specific amount of solvent at a given temperature is its
____. a. | concentration | c. | dilution | b. | density | d. | solubility | | | | |
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24.
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Which of the
following combinations would increase the solubility of a gas in a liquid? a. | Decrease the pressure
and decrease the temperature. | b. | Decrease the pressure and increase the
temperature. | c. | Increase the pressure and decrease the
temperature. | d. | Increase the pressure and increase the
temperature. | | |
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25.
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Which of the
following will speed up the dissolving of a solid solute in water? a. | Cool the
solution. | c. | Grind up the
solvent. | b. | Freeze the solute. | d. | Stir the solution. | | | | |
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