Question 1

Human cells obtain energy by

Accepted Answer

A)  oxidizing carbohydrates. 
B)  reducing proteins. 
C)  reducing carbon dioxide. 
D)  absorbing sunlight. 
A)  oxidizing carbohydrates. 
B)  reducing proteins. 
C)  reducing carbon dioxide. 
D)  absorbing sunlight. A

Question 2

All of the following are commonly involved in explosions EXCEPT

Accepted Answer

A)  aluminum metal. 
B)  ammonium nitrate. 
C)  nitroglycerin. 
D)  trinitrotoluene. 
A)  aluminum metal. 
B)  ammonium nitrate. 
C)  nitroglycerin. 
D)  trinitrotoluene. A

Question 3

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. B

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

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

Question 6

Sodium bisulfite converts bromine (Br2) to bromide (Br-). Sodium bisulfite is a(n)

Accepted Answer

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

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

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 9

With respect to energy content, reduced forms of matter are generally

Accepted Answer

A)  low in potential energy and often make good fuels. 
B)  high in potential energy and often make good fuels. 
C)  low in potential energy and are poor fuels. 
D)  high in potential energy and are poor fuels. 
A)  low in potential energy and often make good fuels. 
B)  high in potential energy and often make good fuels. 
C)  low in potential energy and are poor fuels. 
D)  high in potential energy and are poor fuels.

Question 10

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 11

With respect to volume, approximately what percentage of the air we breathe is composed of elemental argon?

Accepted Answer

A)  ≈ 20% 
B)  ≈ 1% 
C)  ≈ 80% 
D)  ≈ 50% 
A)  ≈ 20% 
B)  ≈ 1% 
C)  ≈ 80% 
D)  ≈ 50%

Question 12

The oxidation number for l in l2 is

Accepted Answer

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

Question 13

In Food Chemistry, reducing agents are sometimes referred to as antioxidants.

Accepted Answer

A) True 
 B)False

Question 14

In the reaction N2 + 3 H2 → 2 NH3, nitrogen is

Accepted Answer

A)  a product. 
B)  a reducing agent. 
C)  an oxidizing agent. 
D)  a catalyst. 
A)  a product. 
B)  a reducing agent. 
C)  an oxidizing agent. 
D)  a catalyst.

Question 15

A substance that is produced as a lead-acid storage battery generates an electric current is

Accepted Answer

A)  Pb. 
B)  PbSO4. 
C)  PbO2. 
D)  H2SO4. 
A)  Pb. 
B)  PbSO4. 
C)  PbO2. 
D)  H2SO4.

Question 16

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 17

Oxidizing agents are often used

Accepted Answer

A)  as antioxidants. 
B)  as antiseptics. 
C)  to form Ag grains in photography. 
D)  to add hydrogen to an unsaturated fat. 
A)  as antioxidants. 
B)  as antiseptics. 
C)  to form Ag grains in photography. 
D)  to add hydrogen to an unsaturated fat.

Question 18

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 19

Which substance is a common reducing agent used in the production of metals from ores?

Accepted Answer

A)  C 
B)  Na2Cr2O7 
C)  H2O 
D)  LiBr 
A)  C 
B)  Na2Cr2O7 
C)  H2O 
D)  LiBr

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 8: Oxidation and Reduction

Human cells obtain energy by

All of the following are commonly involved in explosions EXCEPT

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

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

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

Sodium bisulfite converts bromine (Br2) to bromide (Br-). Sodium bisulfite is a(n)

Photochromic lenses contain

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

With respect to energy content, reduced forms of matter are generally

Most household bleaches act as

With respect to volume, approximately what percentage of the air we breathe is composed of elemental argon?

The oxidation number for l in l2 is

In Food Chemistry, reducing agents are sometimes referred to as antioxidants.

In the reaction N2 + 3 H2 → 2 NH3, nitrogen is

A substance that is produced as a lead-acid storage battery generates an electric current is

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

Oxidizing agents are often used

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?

Which substance is a common reducing agent used in the production of metals from ores?

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

Chemistry

Atoms

Atomic Structure

Chemical Bonds

Chemical Accounting

Gases, Liquids, Solids, and Intermolecular Forces

Acids and Bases

Organic Chemistry

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Nuclear Chemistry

Chemistry of the Earth

Air

Water

Energy

Biochemistry

Food

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Fitness and Health

Chemistry Down on the Farm

Household Chemicals

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Filters

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

Sodium bisulfite converts bromine (Br₂) to bromide (Br^-). Sodium bisulfite is a(n)

The oxidation number for l in l₂ is

In the reaction N₂ + 3 H₂ → 2 NH₃, nitrogen is

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?

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