Multiple Choice Identify the
choice that best completes the statement or answers the question.
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1.
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Which of these would be best to measure 12.6 mL
of liquid ethanol?
a. | 25 mL beaker | c. | 25 mL
Erlenmeyer flask | b. | 25 mL volumetric
flask | d. | 25 mL graduated cylinder |
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2.
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Potassium (K) has a smaller atomic mass than
argon (Ar) even though the atomic number of potassium is larger than the atomic number of
argon. Which of the following best accounts for this observation?
a. | At STP, potassium is in the solid phase, but argon is a
gas. | c. | The most common isotopes of argon have more protons than
the most common isotopes of potassium. | b. | It is easier for a
potassium atom to lose an electron than it is for an argon atom. | d. | The most common
isotopes of potassium have fewer neutrons than the most common isotopes of
argon. |
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3.
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Which of the following is the correct Lewis
electron-dot diagram for the sodium atom?
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4.
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5.
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What are the coefficients of the correctly balanced
equation?
a. | 1, 3, 2, 3 | c. | 1, 2, 2, 2 | b. | 0, 2, 2, 3 | d. | 2, 6, 4, 3 |
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6.
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The correct formula for dinitrogen pentoxide is
—
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7.
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When ionic compounds are named, the name of a
monatomic anion will end in which of the following suffixes?
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8.
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a. | Solid | c. | Solute | b. | Liquid | d. | Solvent |
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9.
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a. | Phosphorus(I) chloride | c. | Phosphorus pentachlorate | b. | Phosphorus(V)
chlorine | d. | Phosphorus pentachloride |
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10.
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11.
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Covalent bonds mainly occur between
—
a. | two nonmetallic elements
| c. | one metallic element and one nonmetallic element | b. | two metallic elements | d. | one metalloid and
one metallic element |
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12.
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What is the volume of the water in this graduated
cylinder?
a. | 4.39 mL | c. | 4.55
mL | b. | 4.41 mL | d. | 5.61
mL |
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13.
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If substance X is a liquid, substance Y is a
gas, and substance Z is a solid, and all are at the same temperature and pressure, then the order
of increasing strength of their intermolecular forces would be —
a. | X < Y < Z | c. | Z <
Y < X | b. | Y < X < Z | d. | Y < Z <
X |
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14.
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a. | 0.00025 g/mL | c. | 2.5
g/mL | b. | 0.0125 g/mL | d. | 250
g/mL |
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15.
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16.
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The diagram shows water molecules in an open beaker and water
molecules that have evaporated into the air above the beaker. Which change in this system will
increase the rate of evaporation?
a. | Adding salt to the water | c. | Increasing the pressure of the air above the water | b. | Increasing the temperature of the water | d. | Increasing the
humidity of the air above the water |
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17.
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a. | It has the same number of neutrons as
potassium. | c. | It is one of the heaviest elements in potassium’s
group. | b. | It is a transition metal from the same period as
potassium. | d. | It is a mix of three unstable isotopes of
potassium. |
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18.
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a. | 1.28 g | c. | 3.85
g | b. | 2.55 g | d. | 32.5
g |
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19.
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a. | 8 atoms of aluminum and 3 atoms of
oxygen | c. | 8 atoms of aluminum and 12 atoms of
oxygen | b. | 6 atoms of aluminum and 3 atoms of
oxygen | d. | 6 atoms of aluminum and 7 atoms of
oxygen |
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20.
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According
to the pH scale, which substance is slightly acidic?
a. | Battery acid | c. | Baking
soda | b. | Black coffee | d. | Drain
cleaner |
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21.
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Which of these is most likely to form between
elements transferring electrons to form oppositely charged particles?
a. | A metallic bond | c. | A
covalent bond | b. | A hydrogen
bond | d. | An ionic bond |
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22.
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Which of the following is a chemical
change?
a. | Salt is dissolved in water. | c. | Gasoline combusts in an engine. | b. | Water is boiled on a stove. | d. | Copper metal is
stretched into a long wire. |
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23.
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The table shows the specific heat capacity of
four substances.
a. | Aluminum | c. | Carbon dioxide | b. | Glass | d. | Water |
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24.
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a. | 0.439 L | c. | 67.2
L | b. | 22.8 L | d. | 91.9
L |
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25.
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Which substance will release the greatest amount of heat when 1.00 mol is
frozen?
a. | Argon | c. | Mercury | b. | Benzene | d. | Water |
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26.
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A student hypothesizes that bromine (Br) has
different chemical properties from krypton (Kr). The periodic table supports this hypothesis
by indicating that —
a. | bromine is a metal while krypton is a
nonmetal | c. | bromine and krypton are members of the same
family | b. | one mole of bromine is heavier than one mole of
krypton | d. | bromine and krypton have different numbers of valence
electrons |
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27.
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A mixture of gases with a pressure of 800 mm Hg
contains 10% oxygen and 90% nitrogen by volume. What is the partial pressure of the oxygen gas
in the mixture?
a. | 10 mm Hg | c. | 700 mm
Hg | b. | 80 mm Hg | d. | 800 mm
Hg |
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28.
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Which graph best shows the relationship between
the volume of a gas and its temperature as the gas pressure remains
constant?
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29.
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One example of an ionic compound is
—
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30.
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A bottle of
chemical Q spills on the floor. According to the MSDS, what is the proper response to this
accident?
a. | Letting the chemical evaporate by blowing fans on the
spill | c. | Wiping up the chemical using paper towels and disposing
of them in the trash | b. | Diluting the
chemical with water, absorbing the liquid with inert material, and disposing of it in the
trash | d. | Absorbing the chemical with inert material and disposing of it in a
chemical waste container |
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31.
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Le Chatelier’s principle describes what
happens to a system in equilibrium when a stress occurs. All of the following could shift an
equilibrium EXCEPT —
a. | changing the pressure on the
system | c. | changing the identity of the
catalyst | b. | changing the temperature of the
system | d. | changing the concentration of one of the
components |
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32.
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What type of
reaction is shown?
a. | Precipitation | c. | Single
replacement | b. | Neutralization | d. | Double
replacement |
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33.
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Hydrogen chloride is a covalent compound. Which
is a correct Lewis dot structure for HCl?
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34.
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Which is the best use for a fume
hood?
a. | Storing glassware | c. | Covering volatile compounds | b. | Removing toxic vapors | d. | |
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35.
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Which of the following equations is
balanced?
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36.
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a. | 0.540 J | c. | 1350
J | b. | 1.50 J | d. | 1670
J |
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37.
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When an electric current is passed through water, the reaction shown
takes place. If the arrow were pointing in the opposite direction, what type of reaction would
the new reaction represent?
a. | Single-replacement | c. | Synthesis | b. | Double-replacement | d. | Decomposition |
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38.
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The picture
shows a small section of elements from the periodic table. Which element has one more proton than
element X?
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39.
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If 1.0 mole of methane reacts with oxygen to produce carbon dioxide
and water, what mass of water is produced?
a. | 16 grams | c. | 36
grams | b. | 18 grams | d. | 44
grams |
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40.
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An example of a chemical property is
—
a. | mass of a substance per unit
volume | c. | point where solid becomes
liquid | b. | ability to dissolve in
solution | d. | tendency to undergo oxidation |
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41.
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Students want to separate and compare the
components of black ink and green ink. Which technique is the best for the students to
use?
a. | Chromatography | c. | Filtration | b. | Decanting | d. | Evaporation |
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42.
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When 80 g of sodium hydroxide, NaOH, are
dissolved in enough water to make 500 mL of solution, the molarity of the solution is
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43.
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a. | Calcium sulfate | c. | Calcium sulfur oxide | b. | Calcium
sulfide | d. | Calcium sulfur oxygen |
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44.
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If the pH of a solution is 4, what is the
pOH?
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45.
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46.
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If the
temperature changes from point M to point N, at constant pressure, compound X undergoes
—
a. | one phase change | c. | three
phase changes | b. | two phase
changes | d. | no change in phase |
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47.
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Which of these best describes the basis on which
new scientific ideas are accepted or rejected?
a. | Popular support | c. | Compelling evidence | b. | Historical
support | d. | Moral and ethical beliefs |
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48.
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Based on its position in the periodic table, the
element sulfur would be expected to have how many valence electrons?
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49.
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50.
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A student determined that the density of a
sample of tin is 8.00 g/mL, when the actual density of tin is 7.28 g/mL. What was the percent
error in the student’s calculation?
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