Redox Reactions Quiz Questions with Answers

Questions : 12 | Total Attempts: 444 | Recent Updated: 16-Jan-2022
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Redox is a type of chemical reaction in which the oxidation states of atoms are changed. Redox reactions are characterized by the actual or formal transfer of electrons between chemical species, most often with one species undergoing oxidation while another species undergoes reduction. An oxidation-reduction reaction is any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron. An example of a redox reaction is the formation of hydrogen fluoride. To study the oxidation and reduction of reactants, we should break the reaction down. Let's know more about Redox Reactions.

Questions Excerpt


1. Reduction involves...

A. Loss of electrons

B. Gain of electrons

C. Increase in the valency of positive part

D. Decrease in the valency of negative part

2. Oxidation involves...

A. Loss of electrons

B. Gain of electrons

C. Increase in the valency of negative part

D. Decrease in the valency of positive part

3. The process in which oxidation number increases is known as...

A. Oxidation

B. Reduction

C. Auto-oxidation

D. None of the above

4. Which of the following statement is correct?

A. Oxidation of a substance is followed by reduction of another

B. Reduction of a substance is followed by oxidation of another

C. Oxidation and reduction are complementary reactions

D. It is not necessary that both oxidation and reduction should take place in the same reaction₂₂

5. Respiration is...

A. Oxidation

B. Reduction

C. Complex formation

D. All of the above

6. The conversion of PbO₂ to (NO₃)₂ is...

A. Oxidation

B. Reduction

C. Neither oxidation nor reduction

D. Both oxidation and reduction

7. The reaction; Kl+l₂→Kl₃ shows...

A. Oxidation

B. Reduction

C. Complex formation

D. All of the above

8. In the reaction 3Mg+N₂→Mg₃ N₂...

A. Magnesium is reduced

B. Magnesium is oxidized

C. Nitrogen is oxidized

D. None of these

9. Which of the following is a redox reaction?

A. H₂SO₄ with NaOH

B. In the atmosphere , O₃ from O₂ by lightning

C. Evaporation of H₂O

D. Nitrogen oxides form nitrogen and oxygen by lightning

10. The conversion of sugar C₁₂H₂₂O₁₁→CO₂...

A. Oxidation

B. Reduction

C. Neither oxidation nor reduction

D. Both oxidation an reduction

11. A reducing agent is a substance that can...

A. Accept electron

B. Donate electron

C. Accept proton

D. Donate protons

12. A stronger oxidizing agent more is...

A. Standard reduction potential of that species

B. The tendency to get itself oxidized

C. The tendency to lose electrons by that species

D. Standard oxidation potential of that species

 

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