Question 1

A battery is a device that converts chemical energy into

Accepted Answer

A) electrical energy. 
B) chemical energy. 
C) nuclear energy. 
D) light energy. 
A) electrical energy. 
B) chemical energy. 
C) nuclear energy. 
D) light energy.

Question 2

Which of the following is NOT true of hydrogen?

Accepted Answer

A) It can form an ion with a +1 charge. 
B) It can form an ion with a -1 charge. 
C) It is usually found as free hydrogen and not combined with other elements. 
D) It is a colorless, odorless gas. 
A) It can form an ion with a +1 charge. 
B) It can form an ion with a -1 charge. 
C) It is usually found as free hydrogen and not combined with other elements. 
D) It is a colorless, odorless gas.

Question 3

Silver is plated on copper by immersing a piece of copper into a solution containing silver ions.In the plating reaction,copper

Accepted Answer

A) is oxidized and is the oxidizing agent. 
B) is oxidized and is the reducing agent. 
C) is reduced and is the oxidizing agent. 
D) is reduced and is the reducing agent. 
A) is oxidized and is the oxidizing agent. 
B) is oxidized and is the reducing agent. 
C) is reduced and is the oxidizing agent. 
D) is reduced and is the reducing agent.

Question 4

When silver tarnishes,

Accepted Answer

A) Ag atoms are oxidized to form Ag⁺ ions. 
B) Ag atoms are reduced to form Ag⁺ ions. 
C) Ag⁺ ions are oxidized to form Ag atoms. 
D) Ag⁺ ions are reduced to form Ag atoms. 
A) Ag atoms are oxidized to form Ag⁺ ions. 
B) Ag atoms are reduced to form Ag⁺ ions. 
C) Ag⁺ ions are oxidized to form Ag atoms. 
D) Ag⁺ ions are reduced to form Ag atoms.

Question 5

Antiseptics are substances that

Accepted Answer

A) are pain killers. 
B) kill microorganisms. 
C) relieve inflammation. 
D) are the same as anesthetics. 
A) are pain killers. 
B) kill microorganisms. 
C) relieve inflammation. 
D) are the same as anesthetics.

Question 6

Consider the following reaction: 2 Fe + 3 Mg²⁺ → 2 Fe³⁺ + 3 Mg
The half-reaction for the oxidation in this reaction is

Accepted Answer

A) Fe → Fe³⁺ + 3 e⁻ 
B) Fe³⁺ + 3 e⁻ → Fe 
C) Mg → Mg²⁺ + 2 e⁻ 
D) Mg²⁺ + 2 e⁻ → Mg 
A) Fe → Fe³⁺ + 3 e⁻ 
B) Fe³⁺ + 3 e⁻ → Fe 
C) Mg → Mg²⁺ + 2 e⁻ 
D) Mg²⁺ + 2 e⁻ → Mg

Question 7

Photochromic lenses contain

Accepted Answer

A) only AgCl embedded in the glass. 
B) only CuCl embedded in the glass. 
C) both AgCl and CuCl embedded in the glass. 
D) neither AgCl nor CuCl embedded in the glass. 
A) only AgCl embedded in the glass. 
B) only CuCl embedded in the glass. 
C) both AgCl and CuCl embedded in the glass. 
D) neither AgCl nor CuCl embedded in the glass.

Question 8

A battery in which a fuel is oxidized at the anode and oxygen is reduced at the cathode is a(n)

Accepted Answer

A) alkaline battery. 
B) fuel cell. 
C) lead storage battery. 
D) lithium battery. 
A) alkaline battery. 
B) fuel cell. 
C) lead storage battery. 
D) lithium battery.

Question 9

In a reaction,the substance undergoing reduction serves as the

Accepted Answer

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

Question 10

The black tarnish on silver is

Accepted Answer

A) AgOH. 
B) Ag₂O. 
C) AgCl. 
D) Ag₂S. 
A) AgOH. 
B) Ag₂O. 
C) AgCl. 
D) Ag₂S.

Question 11

An oxidizing agent that was used in older versions of the Breathalyzer test is

Accepted Answer

A) NaHClO (sodium hypochlorite). 
B) O₃ (ozone). 
C) K₂Cr₂O₇ (potassium dichromate). 
D) AgBr (silver bromide). 
A) NaHClO (sodium hypochlorite). 
B) O₃ (ozone). 
C) K₂Cr₂O₇ (potassium dichromate). 
D) AgBr (silver bromide).

Question 12

Which of the following is NOT a common oxidizing agent?

Accepted Answer

A) iodine 
B) chlorine 
C) ozone 
D) an antioxidant 
A) iodine 
B) chlorine 
C) ozone 
D) an antioxidant

Question 13

Bleach is an oxidizing agent.

Accepted Answer

A) True 
 B)False

Question 14

In the photosynthesis reaction: 6 CO₂ + 6 H₂O → C₆H₁₂O₆ + 6 O₂,the substance that serves as the reducing agent is

Accepted Answer

A) carbon dioxide. 
B) water. 
C) sunlight. 
D) glucose, C₆H₁₂O₆. 
A) carbon dioxide. 
B) water. 
C) sunlight. 
D) glucose, C₆H₁₂O₆.

Question 15

In a black-and-white photograph,the black area on the photographic negative represents

Accepted Answer

A) the region where light fell and silver metal has been deposited during development. 
B) the region where light fell and silver metal has been removed during development. 
C) a region where light did not fall and silver metal has been deposited during development. 
D) a region where light did not fall and silver metal has been removed during development. 
A) the region where light fell and silver metal has been deposited during development. 
B) the region where light fell and silver metal has been removed during development. 
C) a region where light did not fall and silver metal has been deposited during development. 
D) a region where light did not fall and silver metal has been removed during development.

Question 16

Over 20 billion kg of pure oxygen are produced industrially in the United States each year.The source of this oxygen is ________.

Accepted Answer

The answer of Over 20 billion kg of pure oxygen...

Question 17

When a metal reacts with a nonmetal,the metal is oxidized.

Accepted Answer

A) True 
 B)False

Question 18

What is the oxidation number of bismuth in Bi₂O₃?

Accepted Answer

A) +1 
B) +2 
C) +3 
D) +6 
A) +1 
B) +2 
C) +3 
D) +6

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

Silver is plated on copper by immersing a piece of copper into a solution containing silver ions.In the plating reaction,silver ions

Accepted Answer

A) are oxidized and are the oxidizing agent. 
B) are oxidized and are the reducing agent. 
C) are reduced and are the oxidizing agent. 
D) are reduced and are the reducing agent. 
A) are oxidized and are the oxidizing agent. 
B) are oxidized and are the reducing agent. 
C) are reduced and are the oxidizing agent. 
D) are reduced and are the reducing agent.

Exam 8: Oxidation and Reduction

A battery is a device that converts chemical energy into

Which of the following is NOT true of hydrogen?

Silver is plated on copper by immersing a piece of copper into a solution containing silver ions.In the plating reaction,copper

When silver tarnishes,

Antiseptics are substances that

Consider the following reaction: 2 Fe + 3 Mg²⁺ → 2 Fe³⁺ + 3 Mg The half-reaction for the oxidation in this reaction is

Photochromic lenses contain

A battery in which a fuel is oxidized at the anode and oxygen is reduced at the cathode is a(n)

In a reaction,the substance undergoing reduction serves as the

The black tarnish on silver is

An oxidizing agent that was used in older versions of the Breathalyzer test is

Which of the following is NOT a common oxidizing agent?

Bleach is an oxidizing agent.

In the photosynthesis reaction: 6 CO₂ + 6 H₂O → C₆H₁₂O₆ + 6 O₂,the substance that serves as the reducing agent is

In a black-and-white photograph,the black area on the photographic negative represents

Over 20 billion kg of pure oxygen are produced industrially in the United States each year.The source of this oxygen is ________.

When a metal reacts with a nonmetal,the metal is oxidized.

What is the oxidation number of bismuth in Bi₂O₃?

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

Silver is plated on copper by immersing a piece of copper into a solution containing silver ions.In the plating reaction,silver ions

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