Question 1

Which of these substances is the oxidizing agent?
2CO + 2NO → 2CO2 + N2

Accepted Answer

A) CO 
B) NO 
C) CO2 
D) N 
E) C 
A) CO 
B) NO 
C) CO2 
D) N 
E) C

Question 2

Which of these is a redox process?
I. Rusting of iron
II. Respiration
III. Burning hydrocarbons

Accepted Answer

A) I only 
B) III only 
C) I and II 
D) I and III 
E) I, II, and III 
A) I only 
B) III only 
C) I and II 
D) I and III 
E) I, II, and III

Question 3

Which of these statements about redox reactions is incorrect ?

Accepted Answer

A) Oxidation is the loss of oxygen. 
B) Oxidation is the loss of electrons. 
C) Reduction is the gain of electrons. 
D) Oxidation is the loss of hydrogen. 
E) Reduction is the gain of hydrogen. 
A) Oxidation is the loss of oxygen. 
B) Oxidation is the loss of electrons. 
C) Reduction is the gain of electrons. 
D) Oxidation is the loss of hydrogen. 
E) Reduction is the gain of hydrogen.

Question 4

Which of these substances is the oxidizing agent?
PbCl4 + SnCl2 → PbCl2 + SnCl4

Accepted Answer

A) Pb 
B) Sn 
C) SnCl2 
D) PbCl4 
E) Cl2 
A) Pb 
B) Sn 
C) SnCl2 
D) PbCl4 
E) Cl2

Question 5

Which of these is an application of oxidizing agents?

Accepted Answer

A) Disinfectants 
B) Antiseptics 
C) Bleaches 
D) Water treatment 
E) All of these 
A) Disinfectants 
B) Antiseptics 
C) Bleaches 
D) Water treatment 
E) All of these

Question 6

Which substance acts as the anode in the lead-acid automobile battery?
Pb + PbO2 + 4H+ + SO42 −  → 2PbSO4 + 2H2O

Accepted Answer

A) Pb 
B) PbO2 
C) 4H+ 
D) SO42 −  
E) H2O 
A) Pb 
B) PbO2 
C) 4H+ 
D) SO42 −  
E) H2O

Question 7

Which of these pairs are correctly matched?

Accepted Answer

A) Oxidation = the loss of oxygen 
B) Reduction = the reducing agent 
C) Oxidation = the loss of electrons 
D) Oxidation = the gain of hydrogen 
E) Both B and C are correct. 
A) Oxidation = the loss of oxygen 
B) Reduction = the reducing agent 
C) Oxidation = the loss of electrons 
D) Oxidation = the gain of hydrogen 
E) Both B and C are correct.

Question 8

Which of these pairs represent the reactants in photosynthesis?

Accepted Answer

A) Oxygen and carbon dioxide 
B) Carbon dioxide and sugars 
C) Water and carbon dioxide 
D) Oxygen and water 
E) Water and sugars 
A) Oxygen and carbon dioxide 
B) Carbon dioxide and sugars 
C) Water and carbon dioxide 
D) Oxygen and water 
E) Water and sugars

Question 9

Which of these metals are often used to help prevent the rusting of iron?
I. Al
II. Zn
III. Mg
IV. Na

Accepted Answer

A) I only 
B) II only 
C) I and III 
D) I, II, and IV 
E) I, II, and III 
A) I only 
B) II only 
C) I and III 
D) I, II, and IV 
E) I, II, and III

Question 10

During oxidation-reduction reactions, the substance which loses electrons is ____ and the substance which gains electrons is ____.

Accepted Answer

A) oxidized, reduced 
B) reduced, oxidized 
C) reduced, dissolved 
D) reduced, accelerated 
E) oxidized, dissolved 
A) oxidized, reduced 
B) reduced, oxidized 
C) reduced, dissolved 
D) reduced, accelerated 
E) oxidized, dissolved

Question 11

Which of these statements about respiration is correct?

Accepted Answer

A) Carbon is oxidized during respiration. 
B) Respiration is an exothermic process. 
C) Carbon dioxide and water are produced during respiration. 
D) The final step of digestion requires oxygen to oxidize glucose. 
E) All of these statements are correct. 
A) Carbon is oxidized during respiration. 
B) Respiration is an exothermic process. 
C) Carbon dioxide and water are produced during respiration. 
D) The final step of digestion requires oxygen to oxidize glucose. 
E) All of these statements are correct.

Question 12

The fraction of iron produced in the US to replace rusted iron is approximately ___.

Accepted Answer

A) 1\2 
B) 1\3 
C) 1\4 
D) 1\5 
E) 1\6 
A) 1\2 
B) 1\3 
C) 1\4 
D) 1\5 
E) 1\6

Question 13

Which of these is not an oxidation-reduction reaction?

Accepted Answer

A) CuO(s)+ H2(g)→ Cu(s)+ H2O(l) 
B) CO2(g)+ H2(g)→ CO(g)+ H2O(l) 
C) I − (aq)+ NO3 −  (aq)→ NO(g)+ I2(s) 
D) Mn(OH)2(s)+ MnO4 −  (aq)→ MnO42 −  (aq) 
E) HCl(aq)+ NaOH(aq)→ NaCl(aq)+ H2O (l) 
A) CuO(s)+ H2(g)→ Cu(s)+ H2O(l) 
B) CO2(g)+ H2(g)→ CO(g)+ H2O(l) 
C) I − (aq)+ NO3 −  (aq)→ NO(g)+ I2(s) 
D) Mn(OH)2(s)+ MnO4 −  (aq)→ MnO42 −  (aq) 
E) HCl(aq)+ NaOH(aq)→ NaCl(aq)+ H2O (l)

Question 14

Which of these is a characteristic associated with reduction?

Accepted Answer

A) Gaining electrons 
B) Gaining hydrogen 
C) Losing oxygen 
D) All of the above 
E) None of the above 
A) Gaining electrons 
B) Gaining hydrogen 
C) Losing oxygen 
D) All of the above 
E) None of the above

Question 15

Which substance is the oxidizing agent in this redox reaction?
Br  − (aq)+ MnO4 − (aq)→ Br2(l)+ Mn2+(aq)

Accepted Answer

A) Br  −  
B) MnO4 −  
C) Br2 
D) Mn2+ 
E) none of these 
A) Br  −  
B) MnO4 −  
C) Br2 
D) Mn2+ 
E) none of these

Question 16

Which substance is oxidized in this redox reaction?
Br  − (aq)+ MnO4 − (aq)→ Br2(l)+ Mn2+(aq)

Accepted Answer

A) Br  −  
B) MnO4 −  
C) Br2 
D) Mn2+ 
E) none of these 
A) Br  −  
B) MnO4 −  
C) Br2 
D) Mn2+ 
E) none of these

Question 17

Which of these substances is not a reducing agent used in industrial processes?

Accepted Answer

A) CO 
B) H2 
C) O2 
D) C 
E) Both C and D 
A) CO 
B) H2 
C) O2 
D) C 
E) Both C and D

Question 18

Which of these is correctly associated with the anode?
I. Negative electrode
II. Electrode at which a substance loses electrons
III. Electrode at which reduction occurs

Accepted Answer

A) I only 
B) II only 
C) I and II 
D) I and III 
E) I, II, and III 
A) I only 
B) II only 
C) I and II 
D) I and III 
E) I, II, and III

Question 19

Which of these methods are utilized to help prevent the rusting of iron?
I. Painting iron.
II. Treating iron with sulfuric acid.
III. Coating iron with a metal which is more likely to oxidize.

Accepted Answer

A) I only 
B) II only 
C) I and III 
D) I, II, and III 
E) III only 
A) I only 
B) II only 
C) I and III 
D) I, II, and III 
E) III only

Question 20

Which substance is reduced in this redox equation?
HF + Cl2 → F2 + HCl

Accepted Answer

A) HF 
B) Cl2 
C) F 
D) HCl 
E) none of these 
A) HF 
B) Cl2 
C) F 
D) HCl 
E) none of these

Which of these substances is the oxidizing agent? 2CO + 2NO → 2CO₂ + N₂

Which of these is a redox process? I. Rusting of iron II. Respiration III. Burning hydrocarbons

Which of these statements about redox reactions is incorrect ?

Which of these substances is the oxidizing agent? PbCl₄ + SnCl₂ → PbCl₂ + SnCl₄

Which of these is an application of oxidizing agents?

Which substance acts as the anode in the lead-acid automobile battery? Pb + PbO₂ + 4H⁺ + SO₄^{2 −} → 2PbSO₄ + 2H₂O

Which of these pairs are correctly matched?

Which of these pairs represent the reactants in photosynthesis?

Which of these metals are often used to help prevent the rusting of iron? I. Al II. Zn III. Mg IV. Na

During oxidation-reduction reactions, the substance which loses electrons is and the substance which gains electrons is .

Which of these statements about respiration is correct?

The fraction of iron produced in the US to replace rusted iron is approximately ___.

Which of these is not an oxidation-reduction reaction?

Which of these is a characteristic associated with reduction?

Which substance is the oxidizing agent in this redox reaction? Br ⁻(aq)+ MnO₄⁻(aq)→ Br₂(l)+ Mn²⁺(aq)

Which substance is oxidized in this redox reaction? Br ⁻(aq)+ MnO₄⁻(aq)→ Br₂(l)+ Mn²⁺(aq)

Which of these substances is not a reducing agent used in industrial processes?

Which of these is correctly associated with the anode? I. Negative electrode II. Electrode at which a substance loses electrons III. Electrode at which reduction occurs

Which of these methods are utilized to help prevent the rusting of iron? I. Painting iron. II. Treating iron with sulfuric acid. III. Coating iron with a metal which is more likely to oxidize.

Which substance is reduced in this redox equation? HF + Cl₂ → F₂ + HCl

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Exam 14: Oxidation and Reduction

Which of these substances is the oxidizing agent? 2CO + 2NO → 2CO2 + N2

Which of these is a redox process? I. Rusting of iron II. Respiration III. Burning hydrocarbons

Which of these statements about redox reactions is incorrect ?

Which of these substances is the oxidizing agent? PbCl4 + SnCl2 → PbCl2 + SnCl4

Which of these is an application of oxidizing agents?

Which substance acts as the anode in the lead-acid automobile battery? Pb + PbO2 + 4H+ + SO42 − → 2PbSO4 + 2H2O

Which of these pairs are correctly matched?

Which of these pairs represent the reactants in photosynthesis?

Which of these metals are often used to help prevent the rusting of iron? I. Al II. Zn III. Mg IV. Na

During oxidation-reduction reactions, the substance which loses electrons is ____ and the substance which gains electrons is ____.

Which of these statements about respiration is correct?

The fraction of iron produced in the US to replace rusted iron is approximately ___.

Which of these is not an oxidation-reduction reaction?

Which of these is a characteristic associated with reduction?

Which substance is the oxidizing agent in this redox reaction? Br − (aq)+ MnO4 − (aq)→ Br2(l)+ Mn2+(aq)

Which substance is oxidized in this redox reaction? Br − (aq)+ MnO4 − (aq)→ Br2(l)+ Mn2+(aq)

Which of these substances is not a reducing agent used in industrial processes?

Which of these is correctly associated with the anode? I. Negative electrode II. Electrode at which a substance loses electrons III. Electrode at which reduction occurs

Which of these methods are utilized to help prevent the rusting of iron? I. Painting iron. II. Treating iron with sulfuric acid. III. Coating iron with a metal which is more likely to oxidize.

Which substance is reduced in this redox equation? HF + Cl2 → F2 + HCl

Molecular Reasons

The Chemists Toolbox

Atoms and Elements

Molecules, Compounds, and Chemical Reactions

Chemical Bonding

Organic Chemistry

Light and Color

Nuclear Chemistry

Energy for Today

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The Air Around Us

The Liquids and Solids Around Us: Especially Water

Acids and Bases: the Molecules Responsible for Sour and Bitter

The Chemistry of Household Products

Biochemistry and Biotechnology

Drugs and Medicine: Healing, Helping, and Hurting

The Chemistry of Food

Nanotechnology

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Which of these substances is the oxidizing agent? 2CO + 2NO → 2CO₂ + N₂

Which of these substances is the oxidizing agent? PbCl₄ + SnCl₂ → PbCl₂ + SnCl₄

Which substance acts as the anode in the lead-acid automobile battery? Pb + PbO₂ + 4H⁺ + SO₄^{2 −} → 2PbSO₄ + 2H₂O

During oxidation-reduction reactions, the substance which loses electrons is and the substance which gains electrons is .

Which substance is the oxidizing agent in this redox reaction? Br ⁻(aq)+ MnO₄⁻(aq)→ Br₂(l)+ Mn²⁺(aq)

Which substance is oxidized in this redox reaction? Br ⁻(aq)+ MnO₄⁻(aq)→ Br₂(l)+ Mn²⁺(aq)

Which substance is reduced in this redox equation? HF + Cl₂ → F₂ + HCl