Question 1

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.

Question 2

Corrosion is caused by the reduction of metals.

Accepted Answer

A) True 
 B)False

Question 3

Most chemical explosions are ________ reactions.

Accepted Answer

A)  nuclear fission 
B)  oxidation-reduction 
C)  neutralization 
D)  condensation

Question 4

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.

Question 5

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

Accepted Answer

A)  oxygen. 
B)  carbon. 
C)  nitrogen. 
D)  water.

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

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.

Question 8

An oxidation reaction often occurs without a corresponding reduction reaction.

Accepted Answer

A) True 
 B)False

Question 9

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-acid

Question 10

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

Accepted Answer

A)  electron donor 
B)  proton donor 
C)  oxidizing agent 
D)  reducing agent

Question 11

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

Accepted Answer

A) True 
 B)False

Question 12

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.

Question 13

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.

Question 14

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

Accepted Answer

A)  oxidized 
B)  reduced 
C)  neutralized 
D)  electrolyzed

Question 15

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

Accepted Answer

A)  4 
B)  20 
C)  50 
D)  75

Question 16

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

Accepted Answer

A) True 
 B)False

Question 17

In a reaction, the substance undergoing reduction serves as the

Accepted Answer

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

Question 18

Bleach is an oxidizing agent.

Accepted Answer

A) True 
 B)False

Question 19

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.

Question 20

Bread and potatoes are a source of

Accepted Answer

A)  carbohydrates. 
B)  zinc. 
C)  magnesium. 
D)  water.

Exam 8: Oxidation and Reduction

Benzoyl peroxide, used in the treatment of acne, is

Corrosion is caused by the reduction of metals.

Most chemical explosions are ________ reactions.

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

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

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

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

An oxidation reaction often occurs without a corresponding reduction reaction.

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

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

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

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

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

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

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

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

In a reaction, the substance undergoing reduction serves as the

Bleach is an oxidizing agent.

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

Bread and potatoes are a source of