Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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The nonpolar nature of hydrocarbons accounts for which of the following physical
properties?
a. | low melting and boiling points | c. | low solubility in
water | b. | low densities | d. | all of the above |
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2.
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Which of the following is not a structural isomer of pentane?
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3.
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The molecular formula for heptane is
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4.
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Larger molecules of hydrocarbons are broken into two or more smaller hydrocarbon
molecules by a process known as
a. | cracking | c. | synthesis | b. | fractional distillation | d. | reforming |
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5.
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When hydrocarbons reacts with oxygen to produce carbon dioxide and water the
reaction is known as
a. | cracking | c. | reforming | b. | combustion | d. | distillation |
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6.
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During fractional distillation, which of the following chemicals would come out
at the top of the tower?
a. | octane | c. | wax | b. | coal tar | d. | ethane |
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7.
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Alkanes undergo relatively slow reactions because they are
a. | unsaturated | c. | nonpolar | b. | saturated | d. | explosive |
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8.
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Alkanes will not undergo which of the following reactions?
a. | cracking | c. | combustion | b. | reforming | d. | addition |
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9.
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Alkanes do not dissolve in water because
a. | they are nonpolar | c. | they have low boiling points | b. | they are
polar | d. | they have very high
boiling points |
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10.
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What is the smallest member of the alkene family?
a. | methene | c. | propene | b. | ethene | d. | butene |
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11.
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Alkenes contain
a. | one or more C–C double bonds | b. | only single C–C bonds | c. | one or more
C–C triple bonds | d. | contain one or more H–H double
bonds |
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12.
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 What is the most appropriate name for the above
molecule? a. | 2-propene | c. | propyne | b. | propene | d. | propane |
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13.
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 What is the name of the above structure? a. | butene | c. | 1-butene | b. | 2-butene | d. | butane |
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14.
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 What is the above molecule called? a. | 2-butyne | c. | butyne | b. | 3-butyne | d. | 1-butyne |
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15.
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Which of the following classes of organic compounds does not contain
oxygen?
a. | aldehydes | c. | ethers | b. | amines | d. | amides |
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16.
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Which of these compounds tends to be the most reactive?
a. | alkanes | c. | alkynes | b. | alkenes | d. | all have similar
reactivities |
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17.
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The compound with the highest boiling point will be which of the
following?
a. | CH3Cl | c. | CH4 | b. | CH3Br | d. | CH3F |
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18.
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Which compound is most likely to be a gas at room temperature?
a. | propane | c. | propanal | b. | 2-chloropropane | d. | propanone |
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19.
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 The formula shown above is which of the
following? a. | an empirical formula | c. | a structural formula | b. | a molecular formula | d. | a stick formula |
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20.
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 The name of the above compound is a. | propane | c. | propanal | b. | propanol | d. | propanone |
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