Electrochemistry MCQ Set 6

Explore this diverse selection of multiple-choice questions (MCQs) designed for various examinations. Electrochemistry MCQ Set 6 focuses on essential aspects of the subject, ensuring comprehensive preparation across different categories and fields of study to enhance your knowledge and readiness. The right answers for each question is provided next to respective questions for your convenience, you can either attend the test or dirtectly access the right answers by clicking the show correct answer button

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1. In a zinc-carbon dry cell, which substance acts as the electrolyte?

A. Ammonium chloride paste

B. Sulfuric acid

C. Potassium hydroxide

D. Sodium chloride

2. What is the standard reduction potential for the reduction of hydrogen ions to hydrogen gas?

A. 0.00 V

B. +0.34 V

C. -0.76 V

D. +1.50 V

3. What is the main application of an electrolytic cell?

A. Electroplating

B. Fractional distillation

C. Filtration

D. Crystallization

4. In the electrolysis of molten aluminum oxide, what is formed at the cathode?

A. Aluminum

B. Oxygen

C. Hydrogen

D. Chlorine

5. What is the role of a platinum electrode in a hydrogen fuel cell?

A. To act as a catalyst

B. To increase cell potential

C. To provide a surface for oxidation

D. To separate the electrodes

6. Which of the following ions migrates towards the cathode in an electrolytic cell?

A. Cations

B. Anions

C. Both cations and anions

D. Neither cations nor anions

7. What is the standard reduction potential of zinc?

A. -0.76 V

B. +0.34 V

C. +0.76 V

D. -1.10 V

8. What is the main purpose of using a reference electrode in electrochemical measurements?

A. To provide a stable and known potential

B. To increase the cell potential

C. To act as a catalyst

D. To separate the electrodes

9. In a lead-acid battery, what is the electrolyte composed of?

A. Sulfuric acid

B. Hydrochloric acid

C. Sodium chloride

D. Potassium hydroxide

10. What happens at the cathode during the electrolysis of molten sodium chloride?

A. Reduction of sodium ions

B. Oxidation of sodium ions

C. Reduction of chloride ions

D. Oxidation of chloride ions

11. Which of the following is the best conductor of electricity?

A. Silver

B. Copper

C. Gold

D. Aluminum

12. What is the standard electrode potential of hydrogen?

A. 0.00 V

B. +0.34 V

C. -0.76 V

D. +1.50 V

13. What is the purpose of the salt bridge in a galvanic cell?

A. To maintain electrical neutrality

B. To increase the cell potential

C. To provide a surface for the reaction

D. To act as an inert electrode

14. In a galvanic cell, which electrode is the site of oxidation?

A. Anode

B. Cathode

C. Both

D. Neither

15. What is the standard reduction potential for the reduction of copper ions to copper metal?

A. +0.34 V

B. -0.76 V

C. +1.50 V

D. -1.10 V

16. Which gas is produced at the cathode during the electrolysis of aqueous sodium chloride?

A. Hydrogen

B. Oxygen

C. Chlorine

D. Nitrogen

17. What is the main function of a cathode in an electrochemical cell?

A. To provide a surface for reduction reactions

B. To provide a surface for oxidation reactions

C. To increase the cell potential

D. To maintain electrical neutrality

18. In electrochemistry, what is a 'half-cell'?

A. A compartment where either oxidation or reduction occurs

B. A device that measures cell potential

C. A type of electrolyte solution

D. A battery with half the capacity

19. What is the unit of electrochemical equivalent?

A. Gram per Coulomb

B. Coulomb

C. Faraday

D. Ampere

20. Which of the following is a common use of electrolytic cells?

A. Electroplating

B. Filtration

C. Distillation

D. Crystallization

21. What happens at the anode during the electrolysis of water?

A. Oxidation of water

B. Reduction of water

C. Oxidation of hydrogen

D. Reduction of oxygen

22. Which of the following metals is the best conductor of electricity?

A. Silver

B. Copper

C. Gold

D. Aluminum

23. What is the term used for the measure of a battery's ability to store charge?

A. Capacity

B. Voltage

C. Current

D. Resistance

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