Question 1

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 2

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 3

The air that we breathe is composed of approximately ________% oxygen by volume.

Accepted Answer

The answer of The air that we breathe is composed...

Question 4

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 5

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 6

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

Accepted Answer

A) True 
 B)False

Question 7

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 8

The HPPO process utilizes hydrogen peroxide and propylene oxide.One aspect of the HPPO process that is NOT true is

Accepted Answer

A) the reaction is run in aqueous methanol. 
B) Ti is rare and toxic. 
C) the methanol used can be recycled. 
D) it uses a titanium silicate catalyst. 
A) the reaction is run in aqueous methanol. 
B) Ti is rare and toxic. 
C) the methanol used can be recycled. 
D) it uses a titanium silicate catalyst.

Question 9

A substance that is reduced 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 10

An explosion is a rapid chemical reaction that results in a considerable increase in volume.

Accepted Answer

A) True 
 B)False

Question 11

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 12

Aluminum is more reactive than iron is,but iron corrodes more quickly.This occurs because

Accepted Answer

A) aluminum is reduced in the presence of oxygen while iron is oxidized. 
B) aluminum develops a coating of aluminum oxide, which protects it from further reaction. 
C) iron is exposed to both oxygen and water, while aluminum is rarely exposed to water. 
D) iron has a lower density than aluminum does. 
A) aluminum is reduced in the presence of oxygen while iron is oxidized. 
B) aluminum develops a coating of aluminum oxide, which protects it from further reaction. 
C) iron is exposed to both oxygen and water, while aluminum is rarely exposed to water. 
D) iron has a lower density than aluminum does.

Question 13

Approximately what percentage of the earth's crust is composed of oxygen?

Accepted Answer

A) ≈ 5% 
B) ≈ 40% 
C) ≈ 50% 
D) ≈ 75% 
A) ≈ 5% 
B) ≈ 40% 
C) ≈ 50% 
D) ≈ 75%

Question 14

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

Question 15

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 16

Swimming pools are "chlorinated" in order to

Accepted Answer

A) improve taste of the water. 
B) disinfect the water. 
C) clarify the water. 
D) purify the water. 
A) improve taste of the water. 
B) disinfect the water. 
C) clarify the water. 
D) purify the water.

Question 17

In an electrochemical cell,oxidation takes place at the cathode.

Accepted Answer

A) True 
 B)False

Question 18

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 19

Most chemical explosions are ________ reactions.

Accepted Answer

A) nuclear fission 
B) oxidation-reduction 
C) neutralization 
D) condensation 
A) nuclear fission 
B) oxidation-reduction 
C) neutralization 
D) condensation

Question 20

In the following reaction,hydrogen is the ________.
CuO + H₂ → Cu + H₂O

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

Exam 8: Oxidation and Reduction

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

Oxidizing agents are often used

The air that we breathe is composed of approximately ________% oxygen by volume.

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

An electrochemical cell is a device that converts chemical energy into

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

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

The HPPO process utilizes hydrogen peroxide and propylene oxide.One aspect of the HPPO process that is NOT true is

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

An explosion is a rapid chemical reaction that results in a considerable increase in volume.

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

Aluminum is more reactive than iron is,but iron corrodes more quickly.This occurs because

Approximately what percentage of the earth's crust is composed of oxygen?

Which metal is contained in the TAML family of catalysts?

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

Swimming pools are "chlorinated" in order to

In an electrochemical cell,oxidation takes place at the cathode.

The active ingredient in many laundry bleaches and bleaching powders is

Most chemical explosions are ________ reactions.

In the following reaction,hydrogen is the ________. CuO + H₂ → Cu + H₂O

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