Question 1

In the photosynthesis reaction: 6 CO₂ + 6 H₂O → C₆H₁₂O₆ + 6 O₂,carbon dioxide is

Accepted Answer

A) oxidized. 
B) reduced. 
C) oxidized and reduced. 
D) neither oxidized nor reduced. 
A) oxidized. 
B) reduced. 
C) oxidized and reduced. 
D) neither oxidized nor reduced.

Question 2

Which of the following is a reducing agent?

Accepted Answer

A) an antioxidant 
B) an antiseptic 
C) a bleach 
D) a disinfectant 
A) an antioxidant 
B) an antiseptic 
C) a bleach 
D) a disinfectant

Question 3

Which of the following is a definition of reduction?

Accepted Answer

A) Reduction is the gain of oxygen. 
B) Reduction is the gain of hydrogen. 
C) Reduction is the loss of hydrogen. 
D) Reduction is the gain of BOTH electrons AND oxygen. 
A) Reduction is the gain of oxygen. 
B) Reduction is the gain of hydrogen. 
C) Reduction is the loss of hydrogen. 
D) Reduction is the gain of BOTH electrons AND oxygen.

Question 4

In the reaction Fe₂O₃ + 3 H₂ → 2 Fe + 3 H₂O,the reducing agent is

Accepted Answer

A) Fe₂O₃. 
B) H₂. 
C) Fe. 
D) H₂O. 
A) Fe₂O₃. 
B) H₂. 
C) Fe. 
D) H₂O.

Question 5

Which of the following statements is true for electrochemical cells?

Accepted Answer

A) Oxidation occurs at the anode. 
B) Oxidation occurs at the cathode. 
C) Reduction occurs at the anode. 
D) Both oxidation and reduction occur at the cathode. 
A) Oxidation occurs at the anode. 
B) Oxidation occurs at the cathode. 
C) Reduction occurs at the anode. 
D) Both oxidation and reduction occur at the cathode.

Question 6

Most household bleaches act as

Accepted Answer

A) oxidizing agents. 
B) reducing agents. 
C) electron donors. 
D) proton donors. 
A) oxidizing agents. 
B) reducing agents. 
C) electron donors. 
D) proton donors.

Question 7

Antioxidants are

Accepted Answer

A) oxidizing agents found in foods. 
B) reducing agents found in foods. 
C) fat-soluble. 
D) water soluble. 
A) oxidizing agents found in foods. 
B) reducing agents found in foods. 
C) fat-soluble. 
D) water soluble.

Question 8

Naturally occurring reactions of oxygen (O₂)are always desirable.

Accepted Answer

A) True 
 B)False

Question 9

The corrosion of metals,such as the rusting of iron,is an example of

Accepted Answer

A) reduction. 
B) oxidation. 
C) proton transfer. 
D) transmutation. 
A) reduction. 
B) oxidation. 
C) proton transfer. 
D) transmutation.

Question 10

The destructive power generated by an explosive mixture results from the rapid expansion of gaseous products.

Accepted Answer

A) True 
 B)False

Question 11

An oxidizing agent is reduced.

Accepted Answer

A) True 
 B)False

Question 12

Every reduction reaction MUST be accompanied by

Accepted Answer

A) an oxidation reaction. 
B) formation of ionic bonds. 
C) formation of triple bonds. 
D) formation of oxygen. 
A) an oxidation reaction. 
B) formation of ionic bonds. 
C) formation of triple bonds. 
D) formation of oxygen.

Question 13

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. 
A) silver metal. 
B) no silver metal. 
C) fixer. 
D) silver salts.

Question 14

Many traditional oxidation methods are environmentally harmful.

Accepted Answer

A) True 
 B)False

Question 15

A major advantage of lead storage batteries is that they are

Accepted Answer

A) lightweight. 
B) rechargeable. 
C) disposable. 
D) all of the above 
A) lightweight. 
B) rechargeable. 
C) disposable. 
D) all of the above

Question 16

Consider the following unbalanced half-reaction: MnO₄⁻ → MnO₂.The oxidation number of Mn changes from ________,and the Mn is ________.

Accepted Answer

A) +4 to +7; reduced 
B) +7 to +4; oxidized 
C) +4 to +7; oxidized 
D) +7 to +4; reduced 
A) +4 to +7; reduced 
B) +7 to +4; oxidized 
C) +4 to +7; oxidized 
D) +7 to +4; reduced

In the photosynthesis reaction: 6 CO₂ + 6 H₂O → C₆H₁₂O₆ + 6 O₂,carbon dioxide is

Which of the following is a reducing agent?

Which of the following is a definition of reduction?

In the reaction Fe₂O₃ + 3 H₂ → 2 Fe + 3 H₂O,the reducing agent is

Which of the following statements is true for electrochemical cells?

Most household bleaches act as

Antioxidants are

Naturally occurring reactions of oxygen (O₂)are always desirable.

The corrosion of metals,such as the rusting of iron,is an example of

The destructive power generated by an explosive mixture results from the rapid expansion of gaseous products.

An oxidizing agent is reduced.

Every reduction reaction MUST be accompanied by

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

Many traditional oxidation methods are environmentally harmful.

A major advantage of lead storage batteries is that they are

Consider the following unbalanced half-reaction: MnO₄⁻ → MnO₂.The oxidation number of Mn changes from ,and the Mn is .

Chemistry

Atoms

Atomic Structure

Chemical Bonds

Chemical Accounting

Gases, Liquids, Solids, and Intermolecular Forces

Acids and Bases

Organic Chemistry

Polymers

Nuclear Chemistry

Chemistry of the Earth

Air

Water

Energy

Biochemistry

Food

Drugs

Fitness and Health

Chemistry Down on the Farm

Household Chemicals

Poisons

Filters

Exam 8: Oxidation and Reduction

In the photosynthesis reaction: 6 CO₂ + 6 H₂O → C₆H₁₂O₆ + 6 O₂,carbon dioxide is

Which of the following is a reducing agent?

Which of the following is a definition of reduction?

In the reaction Fe₂O₃ + 3 H₂ → 2 Fe + 3 H₂O,the reducing agent is

Which of the following statements is true for electrochemical cells?

Most household bleaches act as

Antioxidants are

Naturally occurring reactions of oxygen (O₂)are always desirable.

The corrosion of metals,such as the rusting of iron,is an example of

The destructive power generated by an explosive mixture results from the rapid expansion of gaseous products.

An oxidizing agent is reduced.

Every reduction reaction MUST be accompanied by

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

Many traditional oxidation methods are environmentally harmful.

A major advantage of lead storage batteries is that they are

Consider the following unbalanced half-reaction: MnO₄⁻ → MnO₂.The oxidation number of Mn changes from ________,and the Mn is ________.

Chemistry

Atoms

Atomic Structure

Chemical Bonds

Chemical Accounting

Gases, Liquids, Solids, and Intermolecular Forces

Acids and Bases

Organic Chemistry

Polymers

Nuclear Chemistry

Chemistry of the Earth

Air

Water

Energy

Biochemistry

Food

Drugs

Fitness and Health

Chemistry Down on the Farm

Household Chemicals

Poisons

Filters

Consider the following unbalanced half-reaction: MnO₄⁻ → MnO₂.The oxidation number of Mn changes from ,and the Mn is .