Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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Which
of the following are pure substances? a. | solutions | c. | homogeneous mixtures | b. | compounds | d. | colloids | | | | |
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2.
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Which
of the following is NOT a pure substance? a. | milk | c. | water | b. | oxygen | d. | carbon
dioxide | | | | |
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3.
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A
substance that is made up of only one kind of atom is a(an) a. | compound. | c. | element. | b. | homogeneous mixture. | d. | solution. | | | | |
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4.
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If
an unknown substance CANNOT be broken down into simpler substances, it is a. | a
compound. | c. | made of one kind
of atom. | b. | an element. | d. | both b and c | | | | |
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5.
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What
is the symbol for aluminum?
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6.
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What
is the symbol for carbon?
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7.
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If a
material contains three elements joined in a fixed proportion, it is a(an) a. | mixture. | c. | atom. | b. | solution. | d. | compound. | | | | |
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8.
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Water
is a compound because it a. | can be broken down into simpler
substances. | b. | always has two hydrogen atoms for each oxygen
atom. | c. | is made of water atoms joined
together. | d. | both a and b | | |
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9.
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Which
of the following is a mixture? a. | carbon dioxide | c. | silicon dioxide | b. | silicon | d. | sand | | | | |
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10.
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Which
of the following is a characteristic of a mixture? a. | has varying
properties | c. | contains only
pure substances | b. | has a fixed composition | d. | both a and b | | | | |
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11.
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A
mixture that appears to contain only one substance is a(an) a. | homogeneous
mixture. | c. | compound. | b. | heterogeneous mixture. | d. | element. | | | | |
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12.
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Which
of the following is a heterogeneous mixture? a. | water in a swimming pool | b. | sugar
water | c. | a jar of mixed nuts | d. | stainless
steel | | |
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13.
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A
mixture can be classified as a solution, suspension, or colloid based on the a. | number of
particles it contains. | b. | size of its largest particles. | c. | color of its
particles. | d. | size of its smallest particles. | | |
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14.
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You
are about to open a container of soy milk but notice that there are instructions to “shake well
before serving.” The soy milk is most likely a a. | solution. | c. | colloid. | b. | pure substance. | d. | suspension. | | | | |
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15.
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Which
of the following is malleable? a. | glass | c. | ice | b. | pottery | d. | gold | | | | |
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16.
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Which
of the following has the highest viscosity? a. | corn syrup | c. | water | b. | milk | d. | orange
juice | | | | |
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17.
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A
substance has a melting point of 0ºC and a boiling point of 100ºC. The substance is most
likely a. | water. | c. | gold. | b. | hydrogen. | d. | table salt. | | | | |
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18.
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A
material that is malleable and conducts electricity is most likely a. | wood. | c. | a
metal. | b. | ice. | d. | motor oil. | | | | |
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19.
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What
physical properties of nylon and leather make them good materials to use for
shoelaces? a. | high density and
low conductivity | b. | durability and flexibility | c. | hardness and
durability | d. | low viscosity and flexibility | | |
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20.
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Which
of the following materials is useful for making molds because it has a low melting
point?
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21.
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Filtration can be used to separate mixtures based on a. | their boiling
points. | b. | their densities. | c. | their melting
points. | d. | the size of their particles. | | |
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22.
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What
method can be used to separate parts of a liquid mixture when the entire mixture can pass through a
filter? a. | filtration | c. | straining | b. | distillation | d. | screening | | | | |
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23.
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When
a physical change in a sample occurs, which of the following does NOT change? a. | shape | c. | volume | b. | temperature | d. | composition | | | | |
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24.
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Which
of the following is a physical change? a. | sawing a piece of wood in half | b. | burning a piece
of wood | c. | rust forming on an iron fence | d. | a copper roof
changing color from red to green | | |
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25.
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Flammability is a material’s ability to burn in the presence of a. | hydrogen. | c. | oxygen. | b. | nitrogen. | d. | carbon dioxide. | | | | |
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26.
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A
substance that has high reactivity a. | easily combines chemically with other
substances. | b. | burns in the presence of water. | c. | displaces
dissolved oxygen. | d. | has a high boiling point. | | |
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27.
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Which
of the following is NOT a clue that a chemical change has occurred? a. | change in
color | c. | formation of a
precipitate | b. | production of a gas | d. | change in shape | | | | |
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28.
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During which of the following chemical changes does a precipitate
form? a. | vinegar is added
to baking powder | c. | lemon juice is
added to water | b. | lemon juice is added to milk | d. | a banana ripens | | | | |
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29.
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Which
of the following is a chemical change? a. | ice melting | b. | ice being
carved | c. | water boiling | d. | water breaking
down into hydrogen and oxygen | | |
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30.
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Which
of the following is a clue of a chemical change? a. | iron changes color when heated | b. | gas bubbles form
in boiling water | c. | balls of wax form when melted wax is poured into ice
water | d. | a gas forms when vinegar and baking soda are
mixed | | |
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