Question 1

Roughly ________% of all iron and steel produced each year is used to replace corroded items.

Accepted Answer

A)   4
B)   20
C)   50
D)   75E) B) and C)
F) C) and D)

Question 2

The small "button" cells used in hearing aids and hand calculators are being replaced by ________ cells.

Accepted Answer

A)   Ni-Cad
B)   hydrogen
C)   zinc-air
D)   copper-acidE) B) and C)
F) None of the above

Question 3

Benzoyl peroxide, used in the treatment of acne, is

Accepted Answer

A)   an acid.
B)   a base.
C)   an oxidizing agent.
D)   a reducing agent.E) A) and C)
F) B) and C)

Question 4

The most abundant element (by mass)  in the human body is

Accepted Answer

A)   oxygen.
B)   carbon.
C)   nitrogen.
D)   water.E) B) and C)
F) None of the above

Question 5

Pure oxygen is obtained by liquefying air and then boiling off the nitrogen and argon.

Accepted Answer

A) True 
 B)False

Question 6

When your car rusts, the major chemical reaction is that between the iron from the steel in the car body with the oxygen from the air to form iron(III)  oxide. When the reaction is balanced, the coefficient of iron is

Accepted Answer

A)   1.
B)   3.
C)   4.
D)   2.E) B) and D)
F) None of the above

Question 7

A catalyst acts by raising the amount of energy available for a reaction to occur.

Accepted Answer

A) True 
 B)False

Question 8

In the following reaction, hydrogen is the ________. CuO + H2 → Cu + H2O

Accepted Answer

A)   electron donor
B)   proton donor
C)   oxidizing agent
D)   reducing agentE) A) and D)
F) A) and C)

Question 9

An explosion is a rapid chemical reaction that results in a considerable increase in volume.

Accepted Answer

A) True 
 B)False

Question 10

An oxidation reaction often occurs without a corresponding reduction reaction.

Accepted Answer

A) True 
 B)False

Question 11

Most chemical explosions are ________ reactions.

Accepted Answer

A)   nuclear fission
B)   oxidation-reduction
C)   neutralization
D)   condensationE) A) and D)
F) B) and C)

Question 12

The "white" areas in a black-and-white "positive" print contain

Accepted Answer

A)   silver metal.
B)   no silver metal.
C)   fixer.
D)   silver salts.E) None of the above
F) A) and B)

Question 13

In a reaction, the substance undergoing reduction serves as the

Accepted Answer

A)   electron donor.
B)   proton donor.
C)   oxidizing agent.
D)   reducing agent.E) B) and C)
F) A) and B)

Question 14

The carbon in C2H6O2 is ________ in the following reaction: C2H6O2 → C2H4O2 + H2

Accepted Answer

A)   oxidized
B)   reduced
C)   neutralized
D)   electrolyzedE) B) and D)
F) A) and C)

Question 15

A substance which lowers the activation energy of a chemical reaction is called a(n)

Accepted Answer

A)   reducing agent.
B)   catalyst.
C)   oxidizing agent.
D)   carcinogen.E) B) and C)
F) A) and B)

Question 16

Bread and potatoes are a source of

Accepted Answer

A)   carbohydrates.
B)   zinc.
C)   magnesium.
D)   water.E) A) and B)
F) B) and C)

Question 17

Bleach is an oxidizing agent.

Accepted Answer

A) True 
 B)False

Question 18

Corrosion is caused by the reduction of metals.

Accepted Answer

A) True 
 B)False

Question 19

ANFO is an explosive mixture of ammonium nitrate, NH4NO3, and fuel oil. When this mixture explodes, the ammonium nitrate undergoes

Accepted Answer

A)   oxidation.
B)   reduction.
C)   both oxidation and reduction.
D)   neither oxidation nor reduction.E) B) and D)
F) A) and D)

Question 20

Aluminum is more reactive than iron is, but iron corrodes more quickly. This occurs because

Accepted Answer

A)   aluminum is reduced in the presence of oxygen while iron is oxidized.
B)   aluminum develops a coating of aluminum oxide, which protects it from further reaction.
C)   iron is exposed to both oxygen and water, while aluminum is rarely exposed to water.
D)   iron has a lower density than aluminum does.E) B) and C)
F) All of the above

Exam 8: Oxidation and Reduction

The carbon in C2H6O2 is ________ in the following reaction: C2H6O2 → C2H4O2 + H2

Correct AnswerverifiedShow Answer

An oxidation reaction often occurs without a corresponding reduction reaction.

Correct AnswerverifiedShow Answer

Bread and potatoes are a source of

Correct AnswerverifiedShow Answer

Corrosion is caused by the reduction of metals.

Correct AnswerverifiedShow Answer

Benzoyl peroxide, used in the treatment of acne, is

Correct AnswerverifiedShow Answer

In a reaction, the substance undergoing reduction serves as the

Correct AnswerverifiedShow Answer

An explosion is a rapid chemical reaction that results in a considerable increase in volume.

Correct AnswerverifiedShow Answer

Most chemical explosions are ________ reactions.

Correct AnswerverifiedShow Answer

In the following reaction, hydrogen is the ________. CuO + H2 → Cu + H2O

Correct AnswerverifiedShow Answer

A substance which lowers the activation energy of a chemical reaction is called a(n)

Correct AnswerverifiedShow Answer

The small "button" cells used in hearing aids and hand calculators are being replaced by ________ cells.

Correct AnswerverifiedShow Answer

Bleach is an oxidizing agent.

Correct AnswerverifiedShow Answer

Aluminum is more reactive than iron is, but iron corrodes more quickly. This occurs because

Correct AnswerverifiedShow Answer

Pure oxygen is obtained by liquefying air and then boiling off the nitrogen and argon.

Correct AnswerverifiedShow Answer

A catalyst acts by raising the amount of energy available for a reaction to occur.

Correct AnswerverifiedShow Answer

ANFO is an explosive mixture of ammonium nitrate, NH4NO3, and fuel oil. When this mixture explodes, the ammonium nitrate undergoes

Correct AnswerverifiedShow Answer

When your car rusts, the major chemical reaction is that between the iron from the steel in the car body with the oxygen from the air to form iron(III) oxide. When the reaction is balanced, the coefficient of iron is

Correct AnswerverifiedShow Answer

The most abundant element (by mass) in the human body is

Correct AnswerverifiedShow Answer

Roughly ________% of all iron and steel produced each year is used to replace corroded items.

Correct AnswerverifiedShow Answer

The "white" areas in a black-and-white "positive" print contain

Correct AnswerverifiedShow Answer

The carbon in C₂H₆O₂ is ________ in the following reaction: C₂H₆O₂ → C₂H₄O₂ + H₂

Correct Answer
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In the following reaction, hydrogen is the ________. CuO + H₂ → Cu + H₂O

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ANFO is an explosive mixture of ammonium nitrate, NH₄NO₃, and fuel oil. When this mixture explodes, the ammonium nitrate undergoes

Correct Answer
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