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 three elements are most
abundant in the Earth's crust? a. | hydrogen, helium, and
lithium | b. | sodium, calcium, and iron | c. | oxygen, nitrogen, and iron | d. | carbon, nitrogen, and
oxygen | e. | oxygen, aluminum, and silicon | | |
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2.
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Which two elements are most
abundant in our solar system? a. | hydrogen and
helium | b. | hydrogen and oxygen | c. | helium and iron | d. | hydrogen and
iron | e. | carbon and oxygen | | |
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3.
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What is the highest oxidation
number of bromine?
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4.
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Approximately 300 billion
liters of hydrogen is produced annually. The majority of the hydrogen is used in the production of
____. a. | ammonia | b. | hydrochloric
acid | c. | methane | d. | sodium hydroxide | e. | water | | |
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5.
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Oxides of the alkaline earth
family form ____ upon reaction with water. a. | basic solutions | b. | carbon dioxide gas | c. | alkaline earth
hydrides | d. | oxygen gas | e. | hydrogen gas | | |
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6.
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In what way is cryolite
(Na3AlF6) used in the production of aluminum? a. | Cryolite is a catalyst, it increases the rate of aluminum
reduction. | b. | Cryolite-bauxite mixtures melt at lower temperatures than pure
bauxite. | c. | Cryolite makes aluminum more corrosion
resistant. | d. | Cryolite is reduced to aluminum at the
cathode. | e. | Cryolite is oxidized to F2(g) at the
anode. | | |
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7.
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The only acid that attacks
silicon dioxide is a. | HClO4 | b. | HF | c. | HNO3 | d. | H2SO4 | e. | HIO4 | | |
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8.
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Write a balanced chemical
equation for the reaction of sulfur trioxide and water. a. | SO3(g) + H2O(l)
→ H2SO4(aq) | b. | 2 SO3(g) + 2 H2O(l)
→ H2SO4(aq) + H2S(g) + 2
O2(g) | c. | SO3(g) +
H2O(l) →
SO42-(g) + H2(g) | d. | SO3(g) + H2O(l)
→ SO4(aq) + H2(g) | e. | 2 SO3(g) + 2 H2O(l)
→ 2 H2SO3(aq) +
O2(g) | | |
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9.
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Ammonium perchlorate can
decompose violently according to the chemical equation below.
2 NH4ClO4(s)
→ N2(g) + Cl2(g) + 2 O2(g) + 4
H2O(g)
What volume of gas is produced by the decomposition of 225 g
NH4ClO4 at 252 °C and
1.0 atm? (R = 0.08206 L·atm/K·mol) a. | 4.0 × 101
L | b. | 1.6 ×
102 L | c. | 3.3 ×
102 L | d. | 6.6 ×
102 L | e. | 8.3 ×
102 L | | |
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10.
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Anhydrous hydrogen fluoride is
used in all of the following applications EXCEPT a. | etching fluorescent light
bulbs. | b. | the production of refrigerants. | c. | as a propellant in rocket fuels. | d. | the production of plastics. | e. | the production of
herbicides. | | |
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