Question 1

The chemical basis of converting light into a photographic silver image is based on the fact that

Accepted Answer

A) Ag⁺ exposed to light is easier to reduce to Ag than unexposed Ag⁺. 
B) Ag⁺ exposed to light is more difficult to reduce to Ag than unexposed Ag⁺. 
C) Ag⁺ exposed to light is easier to oxidize to Ag than unexposed Ag⁺. 
D) Ag⁺ exposed to light is more difficult to oxidize to Ag than unexposed Ag⁺. 
A) Ag⁺ exposed to light is easier to reduce to Ag than unexposed Ag⁺. 
B) Ag⁺ exposed to light is more difficult to reduce to Ag than unexposed Ag⁺. 
C) Ag⁺ exposed to light is easier to oxidize to Ag than unexposed Ag⁺. 
D) Ag⁺ exposed to light is more difficult to oxidize to Ag than unexposed Ag⁺.

Question 2

Given their mode of action,antiseptics are generally best classified as

Accepted Answer

A) oxidizing agents. 
B) reducing agents. 
C) acids. 
D) bases. 
A) oxidizing agents. 
B) reducing agents. 
C) acids. 
D) bases.

Question 3

A mixture of ammonium nitrate (NH₄NO₃)and fuel oil has often been used in terrorist attacks around the world.Which of the following statements is NOT true for this type of explosive mixture?

Accepted Answer

A) The materials are readily available to the general public. 
B) It is very difficult to obtain the ammonium nitrate. 
C) The ammonium nitrate serves as both an oxidizing agent and a reducing agent. 
D) The reaction results in gaseous products and a huge increase in volume. 
A) The materials are readily available to the general public. 
B) It is very difficult to obtain the ammonium nitrate. 
C) The ammonium nitrate serves as both an oxidizing agent and a reducing agent. 
D) The reaction results in gaseous products and a huge increase in volume.

Question 4

When your car rusts,the major chemical reaction is between the iron from the steel in the car body with the oxygen from the air to form iron(III)oxide.Write and balance the chemical equation.

Accepted Answer

4 Fe + 3 O

Question 5

Zinc is oxidized in the following reaction:
Zn + 2 H⁺ → Zn²⁺ + H₂

Accepted Answer

A) True 
 B)False

Question 6

Which of the following is NOT a common reducing agent?

Accepted Answer

A) hydrogen peroxide 
B) hydrogen 
C) an antioxidant 
D) coal/coke 
A) hydrogen peroxide 
B) hydrogen 
C) an antioxidant 
D) coal/coke

Question 7

Magnesium burns brightly in the presence of oxygen.When magnesium reacts with oxygen,the compound formed is

Accepted Answer

A) MgO. 
B) MgO₃. 
C) Mg₃O. 
D) Mg₄O₄. 
A) MgO. 
B) MgO₃. 
C) Mg₃O. 
D) Mg₄O₄.

Question 8

The black,granular material that fills a dry cell in a common flashlight (between the carbon rod and the zinc shell)is manganese(II)oxide,MnO₂.The oxidation number of manganese in MnO₂ is

Accepted Answer

A) +2. 
B) -2. 
C) +4. 
D) -4. 
A) +2. 
B) -2. 
C) +4. 
D) -4.

Question 9

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) 
A) 1) 
B) 3) 
C) 4) 
D) 2)

Question 10

A device that generates an electrical current by taking advantage of a difference in the spontaneous tendency of substances to lose and gain electrons is called an

Accepted Answer

A) electrochemical cell. 
B) electrolysis cell. 
C) electroplating cell. 
D) electrolyte cell. 
A) electrochemical cell. 
B) electrolysis cell. 
C) electroplating cell. 
D) electrolyte cell.

Question 11

In which of the following partial reactions is the reactant undergoing reduction? (Note: The reactions are not complete.)

Accepted Answer

A) PbO → Pb 
B) KClO₂ → KClO₃ 
C) SnO → SnO₂ 
D) Cu₂O → CuO 
A) PbO → Pb 
B) KClO₂ → KClO₃ 
C) SnO → SnO₂ 
D) Cu₂O → CuO

Question 12

Aluminum is more reactive than iron,yet it is used today for a variety of applications in which iron would corrode (cans,rain gutters,etc.).The reason for the corrosion durability of aluminum is that

Accepted Answer

A) aluminum does not react with oxygen. 
B) very unreactive aluminum oxide forms a thin layer on aluminum. 
C) aluminum does not undergo oxidation. 
D) all aluminum products are treated with a plastic coating. 
A) aluminum does not react with oxygen. 
B) very unreactive aluminum oxide forms a thin layer on aluminum. 
C) aluminum does not undergo oxidation. 
D) all aluminum products are treated with a plastic coating.

Question 13

Palladium metal can absorb up to 900 times its own volume of hydrogen.

Accepted Answer

A) True 
 B)False

Question 14

If the oxidation number of an atom decreases,the atom has undergone oxidation.

Accepted Answer

A) True 
 B)False

Question 15

An oxidation reaction often occurs without a corresponding reduction reaction.

Accepted Answer

A) True 
 B)False

Question 16

Corrosion is caused by the reduction of metals.

Accepted Answer

A) True 
 B)False

Question 17

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

Question 18

Bread and potatoes are a source of

Accepted Answer

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

Question 19

In which of the following is the reactant undergoing reduction? (Note: These reactions are not complete chemical equations.)

Accepted Answer

A) C₂H₄O → C₂H₄O₂ 
B) C₂H₄O → C₂H₆O 
C) CO → CO₂ 
D) CH₄ → C 
A) C₂H₄O → C₂H₄O₂ 
B) C₂H₄O → C₂H₆O 
C) CO → CO₂ 
D) CH₄ → C

Question 20

Consider the following unbalanced equation between copper(I)ions and iron to produce copper metal and iron(II)ions: Cu⁺ + Fe → Cu + Fe²⁺ What is oxidized in this reaction?

Accepted Answer

A) copper(I)ion 
B) iron 
C) copper 
D) iron(II)ion 
A) copper(I)ion 
B) iron 
C) copper 
D) iron(II)ion

Exam 8: Oxidation and Reduction

The chemical basis of converting light into a photographic silver image is based on the fact that

Given their mode of action,antiseptics are generally best classified as

A mixture of ammonium nitrate (NH₄NO₃)and fuel oil has often been used in terrorist attacks around the world.Which of the following statements is NOT true for this type of explosive mixture?

When your car rusts,the major chemical reaction is between the iron from the steel in the car body with the oxygen from the air to form iron(III)oxide.Write and balance the chemical equation.

Zinc is oxidized in the following reaction: Zn + 2 H⁺ → Zn²⁺ + H₂

Which of the following is NOT a common reducing agent?

Magnesium burns brightly in the presence of oxygen.When magnesium reacts with oxygen,the compound formed is

The black,granular material that fills a dry cell in a common flashlight (between the carbon rod and the zinc shell)is manganese(II)oxide,MnO₂.The oxidation number of manganese in MnO₂ is

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

A device that generates an electrical current by taking advantage of a difference in the spontaneous tendency of substances to lose and gain electrons is called an

In which of the following partial reactions is the reactant undergoing reduction? (Note: The reactions are not complete.)

Aluminum is more reactive than iron,yet it is used today for a variety of applications in which iron would corrode (cans,rain gutters,etc.).The reason for the corrosion durability of aluminum is that

Palladium metal can absorb up to 900 times its own volume of hydrogen.

If the oxidation number of an atom decreases,the atom has undergone oxidation.

An oxidation reaction often occurs without a corresponding reduction reaction.

Corrosion is caused by the reduction of metals.

Benzoyl peroxide,used in the treatment of acne,is

Bread and potatoes are a source of

In which of the following is the reactant undergoing reduction? (Note: These reactions are not complete chemical equations.)

Consider the following unbalanced equation between copper(I)ions and iron to produce copper metal and iron(II)ions: Cu⁺ + Fe → Cu + Fe²⁺ What is oxidized in this reaction?

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