Question 1

Copper is plated on zinc by immersing a piece of zinc into a solution containing copper(II) ions. In the plating reaction, copper II ions

Accepted Answer

A)  gain two electrons and is are oxidized. 
B)  gain two electrons and is are reduced. 
C)  lose two electrons and is are reduced. 
D)  lose two electrons and is are oxidized. 
A)  gain two electrons and is are oxidized. 
B)  gain two electrons and is are reduced. 
C)  lose two electrons and is are reduced. 
D)  lose two electrons and is are oxidized.

Question 2

Which substance is a reducing agent?

Accepted Answer

A)  C 
B)  I2 
C)  H2O2 
D)  TeO2 
A)  C 
B)  I2 
C)  H2O2 
D)  TeO2

Question 3

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

Question 4

The oxidation number of F-1 is

Accepted Answer

A)  -1. 
B)  0. 
C)  +1. 
D)  2. 
A)  -1. 
B)  0. 
C)  +1. 
D)  2.

Question 5

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 6

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 7

Which of the following is NOT true of a catalyst?

Accepted Answer

A)  A catalyst will speed up the rate of a reaction. 
B)  A catalyst will lower the activation energy for a reaction. 
C)  A catalyst is used up when it catalyzes a reaction. 
D)  A catalyst is not changed when it catalyzes a reaction. 
A)  A catalyst will speed up the rate of a reaction. 
B)  A catalyst will lower the activation energy for a reaction. 
C)  A catalyst is used up when it catalyzes a reaction. 
D)  A catalyst is not changed when it catalyzes a reaction.

Question 8

Nickel, platinum, and palladium are used as catalysts for reactions for hydrogen. These metals have

Accepted Answer

A)  great catalytic activity and not much of surface area, so hydrogen absorbed on the surface of these metals is less reactive than ordinary hydrogen gas. 
B)  great catalytic activity and lots of surface area, so hydrogen absorbed on the surface of these metals is more reactive than ordinary hydrogen gas. 
C)  little catalytic activity and lots of surface area, so hydrogen absorbed on the surface of these metals is more reactive than ordinary hydrogen gas. 
D)  great catalytic activity and lots of surface area, so hydrogen absorbed on the surface of these metals is less reactive than ordinary hydrogen gas. 
A)  great catalytic activity and not much of surface area, so hydrogen absorbed on the surface of these metals is less reactive than ordinary hydrogen gas. 
B)  great catalytic activity and lots of surface area, so hydrogen absorbed on the surface of these metals is more reactive than ordinary hydrogen gas. 
C)  little catalytic activity and lots of surface area, so hydrogen absorbed on the surface of these metals is more reactive than ordinary hydrogen gas. 
D)  great catalytic activity and lots of surface area, so hydrogen absorbed on the surface of these metals is less reactive than ordinary hydrogen gas.

Question 9

The active ingredient in many laundry bleaches and bleaching powders is

Accepted Answer

A)  hydrogen peroxide, H2O2. 
B)  hypochlorite ion, ClO-. 
C)  sodium dichromate, Na2Cr2O7. 
D)  chlorine, Cl2. 
A)  hydrogen peroxide, H2O2. 
B)  hypochlorite ion, ClO-. 
C)  sodium dichromate, Na2Cr2O7. 
D)  chlorine, Cl2.

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

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

Accepted Answer

A)  Cl2 → 2 Cl- 
B)  WO3 → W 
C)  2 H+ → H2 
D)  C → CO2 
A)  Cl2 → 2 Cl- 
B)  WO3 → W 
C)  2 H+ → H2 
D)  C → CO2

Question 12

An electrochemical cell 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 13

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 14

All of the following are reducing agents EXCEPT

Accepted Answer

A)  antioxidants. 
B)  coal (coke). 
C)  hydrogen. 
D)  chlorine. 
A)  antioxidants. 
B)  coal (coke). 
C)  hydrogen. 
D)  chlorine.

Question 15

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

Question 16

Which metal is contained in the TAML family of catalysts?

Accepted Answer

A)  Cd 
B)  Pd 
C)  Fe 
D)  Mn 
A)  Cd 
B)  Pd 
C)  Fe 
D)  Mn

Copper is plated on zinc by immersing a piece of zinc into a solution containing copper(II) ions. In the plating reaction, copper II ions

Which substance is a reducing agent?

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?

The oxidation number of F^-1 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

Every reduction reaction MUST be accompanied by

Which of the following is NOT true of a catalyst?

Nickel, platinum, and palladium are used as catalysts for reactions for hydrogen. These metals have

The active ingredient in many laundry bleaches and bleaching powders is

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

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

An electrochemical cell is a device that converts chemical energy into

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

All of the following are reducing agents EXCEPT

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

Which metal is contained in the TAML family of catalysts?

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Exam 8: Oxidation and Reduction

Copper is plated on zinc by immersing a piece of zinc into a solution containing copper(II) ions. In the plating reaction, copper II ions

Which substance is a reducing agent?

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?

The oxidation number of F-1 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

Every reduction reaction MUST be accompanied by

Which of the following is NOT true of a catalyst?

Nickel, platinum, and palladium are used as catalysts for reactions for hydrogen. These metals have

The active ingredient in many laundry bleaches and bleaching powders is

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

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

An electrochemical cell is a device that converts chemical energy into

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

All of the following are reducing agents EXCEPT

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

Which metal is contained in the TAML family of catalysts?

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

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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?

The oxidation number of F^-1 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

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