Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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Which chemical formula shows a total of four atoms?
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2.
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Which would you stir into tea to give it a sweet taste?
a. | C12H22O11 | b. | C2H4O2 | c. | C3H8 | d. | C2H6O |
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3.
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NaCl is a(n)
a. | molecular element | b. | molecular compound | c. | ionic
element | d. | ionic compound |
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4.
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Of the following, which is an anion?
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5.
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Which would be named by adding “-ide” at the end?
a. | the Ca in CaO, quicklime | b. | the Mg in Mg(OH)2, milk of
magnesia | c. | the O in C9H8O4, Aspirin | d. | the Cl in KCl,
potash |
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6.
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Which element has the most stable atoms?
a. | magnesium | b. | neon | c. | chlorine | d. | hydrogen |
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7.
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Which substance makes up approximately 80 % of our atmosphere?
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8.
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Alloys are
a. | mixtures of metallic elements held together by ionic bonds | b. | solids composed of
only one kind of metallic atom | c. | solid solutions that can have varying
proportions of two or more elements | d. | pure, solid substances with a fixed percentage
of elements in every sample |
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9.
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Which combination of elements would most likely form a compound in which atoms
join by sharing electrons in covalent bonds?
a. | Mg and O | b. | K and Cl | c. | C and
O | d. | Ne and He |
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10.
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What do burning and rusting have in common?
a. | both are relatively rapid processes | b. | both produce iron oxide | c. | both take place
faster when water is present | d. | both can occur when oxygen is
present |
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11.
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What information do molecular models provide beyond what a chemical formula
indicates?
a. | the types of atoms that make up the molecules of a substance | b. | the number of each
type of atom in the molecules of a substance | c. | the number of neutrons in each type of atom
found in a substance | d. | the three-dimensional shape of the molecules
that make up a substance |
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12.
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If a sphere in a molecular model kit has only one hole in it to accept bonding
links, the sphere most likely represents
a. | a hydrogen atom | b. | a nitrogen atom | c. | a carbon
atom | d. | an oxygen atom |
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13.
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Which observation would suggest that a sample of an unknown gas is carbon
dioxide?
a. | The gas reignites a glowing splint. | b. | The gas makes a popping sound when a burning
splint is brought near. | c. | The gas produces a white cloudiness when mixed
with limewater. | d. | The gas makes a burning splint burn even more
vigourously. |
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14.
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Hydrogen peroxide can bleach materials because
a. | it is good at washing pigment molecules out of them | b. | it is a strong
acid | c. | it is a catalyst | d. | it decomposes to form oxygen, which is very
reactive |
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15.
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If a catalyst is added to a chemical reaction
a. | different chemical products are formed | b. | reactants are converted to products more
rapidly | c. | the chemical reaction stops completely | d. | the catalyst is
consumed |
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16.
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Which is something that is important for containers in which hydrogen peroxide
is stored?
a. | They should be opaque. | b. | They should be made of
glass. | c. | They should be stored at high temperature. | d. | They should be
sealed very tightly when large. |
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17.
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DDT is
a. | good at killing weeds (a good herbicide) | b. | short-lived in the
environment | c. | soluble in body fat | d. | found in oils used to lubricate electrical
equipment |
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18.
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In bioaccumulation
a. | the number of species in a region steadily increases due to
evolution | b. | a toxin builds up to high levels in a single organism | c. | dead plant material
builds up in the bottom of a lake and begins rotting | d. | animals about to hibernate overeat to build up
stored fat for their long sleep |
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19.
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Which material is least likely to decompose in a compost pile over time?
a. | vegetable waste from the kitchen | b. | polyethylene plastic
containers | c. | newspaper pages | d. | sawdust |
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20.
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A comparison of the levels of toxic chemicals in the breast milk of Inuit women
and women in the cities of southern Québec showed that milk from the
a. | Inuit women had more toxins because of concentration of pollutants in the food
chain | b. | Inuit women had more toxins because they had switched to a diet of processed
foods | c. | Inuit women had fewer toxins because they lived in an unpolluted, remote
region | d. | city-dwelling women had more toxins because of exposure to more
pollution |
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