Electrochemistry Quiz - CBSE Class 11 Science

Free practice quiz: Electrochemistry (CBSE Class 11 Science). 20 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 11 Science practice quiz has 20 multiple-choice questions on Electrochemistry, and 20 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. What is the standard electrode potential of a standard hydrogen electrode (SHE)?

   1. 0.00 V
   2. 1.00 V
   3. -1.00 V
   4. 2.00 V
   Show answer

   Answer: A. 0.00 V

   By definition, the standard electrode potential of SHE is 0.00 V.

2. In an electrolytic cell, what is the role of the anode?

   1. Reduction occurs
   2. Oxidation occurs
   3. Both oxidation and reduction occur
   4. Neither oxidation nor reduction occurs
   Show answer

   Answer: B. Oxidation occurs

   Oxidation (loss of electrons) takes place at the anode in an electrolytic cell.

3. Explain the concept of overpotential.

   1. The potential required to initiate a reaction
   2. The extra potential needed to overcome activation energy
   3. The potential difference between two electrodes
   4. The potential at equilibrium
   Show answer

   Answer: B. The extra potential needed to overcome activation energy

   Overpotential is the additional voltage required beyond the theoretical value to drive an electrochemical reaction at a significant rate.

4. What is the role of a salt bridge in a galvanic cell?

   1. To increase the conductivity
   2. To maintain electrical neutrality
   3. To provide a path for electrons
   4. To prevent the build-up of charge
   Show answer

   Answer: B. To maintain electrical neutrality

   The salt bridge allows the flow of ions to maintain electrical neutrality in the half-cells, preventing charge build-up and ensuring continued electron flow.

5. What are the factors affecting the rate of corrosion?

   1. Nature of the metal
   2. Presence of impurities
   3. Environmental conditions
   4. All of the above
   Show answer

   Answer: D. All of the above

   Corrosion rate is influenced by the metal's nature, impurities, and environmental factors like humidity, temperature, and the presence of electrolytes.

More questions in this quiz

Answers and explanations are in the full quiz.

1. Which of the following is NOT a type of electrochemical cell?
2. What is the Nernst equation used for?
3. What is the relationship between Gibbs free energy and cell potential?
4. What is the process of converting chemical energy into electrical energy called?
5. Define Faraday's constant.
6. What is the effect of increasing the concentration of reactants on the cell potential of a galvanic cell?
7. What is the difference between a primary and a secondary cell?
8. Describe the process of corrosion.
9. Explain how a sacrificial anode protects a metal from corrosion.
10. How does temperature affect the cell potential of a galvanic cell?
11. Explain the concept of electrochemical series.
12. Calculate the cell potential for a galvanic cell with the following half-reactions (given standard reduction potentials): Cu2+ + 2e- → Cu (E° = +0.34 V) and Zn2+ + 2e- → Zn (E° = -0.76 V)
13. Discuss the application of electrochemistry in various fields.
14. Derive the Nernst equation and explain the significance of each term.
15. Explain the concept of fuel cells and their advantages over conventional batteries.

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