Electrochemistry MCQ Set 3

Explore this diverse selection of multiple-choice questions (MCQs) designed for various examinations. Electrochemistry MCQ Set 3 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. What is the principle behind the working of a galvanic cell?

A. Redox reactions

B. Acid-base reactions

C. Precipitation reactions

D. Neutralization reactions

2. What is the role of a reducing agent in a redox reaction?

A. To donate electrons

B. To accept electrons

C. To act as a catalyst

D. To provide energy

3. Which of the following is a characteristic of a secondary cell?

A. It can be recharged

B. It can only be used once

C. It is always disposable

D. It has a higher internal resistance

4. What is the function of a separator in a battery?

A. To prevent short-circuiting

B. To increase the battery capacity

C. To act as a catalyst

D. To provide energy

5. What is the main purpose of an electrolytic capacitor?

A. To store electrical energy

B. To convert electrical energy to chemical energy

C. To measure the cell potential

D. To provide a surface for the reaction

6. In electrochemistry, what does the term 'electrolyte' refer to?

A. A substance that conducts electricity when dissolved in water

B. A type of electrode

C. A non-conductive material

D. A device that measures current

7. What is the role of a salt bridge in an electrochemical cell?

A. To maintain electrical neutrality

B. To increase the cell potential

C. To act as a catalyst

D. To provide a surface for the reaction

8. In a fuel cell, what is the primary source of energy?

A. Chemical reactions

B. Electrical energy

C. Mechanical energy

D. Thermal energy

9. What is the standard cell potential of a zinc-copper cell?

A. +1.10 V

B. +0.76 V

C. -0.34 V

D. +0.34 V

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

A. Capacity

B. Voltage

C. Current

D. Resistance

11. Which of the following is reduced in a redox reaction?

A. The substance that gains electrons

B. The substance that loses electrons

C. The substance that acts as a catalyst

D. The substance that provides energy

12. In the electrolysis of molten sodium chloride, what is the product at the anode?

A. Chlorine gas

B. Sodium metal

C. Hydrogen gas

D. Oxygen gas

13. What does the term 'standard reduction potential' refer to?

A. The tendency of a substance to gain electrons

B. The tendency of a substance to lose electrons

C. The measure of a battery's ability to store charge

D. The voltage produced by an electrochemical cell

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

A. Anode

B. Cathode

C. Both

D. Neither

15. Which of the following is an example of a dry cell?

A. Alkaline battery

B. Lead-acid battery

C. Nickel-cadmium battery

D. Lithium-ion battery

16. What is the primary 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

17. What is the term used for the electrode where oxidation occurs?

A. Anode

B. Cathode

C. Electrolyte

D. Salt bridge

18. What is the product formed at the anode during the electrolysis of aqueous copper sulfate solution?

A. Oxygen gas

B. Copper metal

C. Hydrogen gas

D. Sulfur dioxide

19. What is the purpose of a reference electrode in electrochemistry?

A. To provide a stable and known potential for comparison

B. To increase the cell potential

C. To act as a catalyst

D. To separate the electrodes

20. Which of the following is a secondary cell?

A. Nickel-cadmium battery

B. Alkaline battery

C. Zinc-carbon battery

D. Dry cell

21. In a concentration cell, the electrode potential is generated due to

A. difference in concentration

B. difference in pressure

C. difference in temperature

D. difference in volume

22. What is the main advantage of using a lithium-ion battery?

A. High energy density

B. Low cost

C. High internal resistance

D. Short lifespan

23. In electrolysis, what is the term used for the process of depositing a layer of metal on a surface?

A. Electroplating

B. Electrorefining

C. Electrolytic cleaning

D. Galvanization

24. What is the main use of a galvanometer in electrochemistry?

A. To measure the current

B. To measure the voltage

C. To measure the resistance

D. To measure the capacitance

25. In a zinc-carbon dry cell, which component acts as the cathode?

A. Carbon rod

B. Zinc casing

C. Ammonium chloride paste

D. Manganese dioxide

26. What happens to the mass of the anode in an electrolytic cell during electrolysis?

A. It decreases

B. It increases

C. It remains the same

D. It fluctuates

27. What is the main advantage of using a fuel cell?

A. High efficiency and low emissions

B. Low initial cost

C. Easy maintenance

D. Long lifespan

28. Which of the following metals is commonly used as the anode in a galvanic cell?

A. Zinc

B. Copper

C. Silver

D. Platinum

29. In a lead-acid battery, what is the product formed at the cathode during discharge?

A. Lead sulfate

B. Lead dioxide

C. Hydrogen gas

D. Sulfuric acid

30. What is the term used for the electrode where reduction occurs?

A. Cathode

B. Anode

C. Electrolyte

D. Salt bridge

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