Electrochemistry MCQ Set 1

Explore this diverse selection of multiple-choice questions (MCQs) designed for various examinations. Electrochemistry MCQ Set 1 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. Which of the following is a strong electrolyte?

A. Acetic acid

B. Ammonia

C. Sodium chloride

D. Glucose

2. What is the unit of electrochemical equivalent?

A. Coulomb

B. Faraday

C. Gram per Coulomb

D. Ampere

3. In a galvanic cell, the anode is the electrode where

A. oxidation occurs

B. reduction occurs

C. neither oxidation nor reduction occurs

D. both oxidation and reduction occur

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

A. Copper

B. Silver

C. Gold

D. Aluminum

5. What is the standard electrode potential of the hydrogen electrode?

A. +1.0 V

B. 0.0 V

C. -1.0 V

D. +0.5 V

6. The Nernst equation relates the cell potential to

A. temperature

B. concentration of reactants

C. concentration of products

D. all of the above

7. In electrolysis, the substance that is oxidized is found at the

A. anode

B. cathode

C. both anode and cathode

D. none of the above

8. Which of the following is a primary cell?

A. Lead-acid battery

B. Nickel-cadmium battery

C. Lithium-ion battery

D. Dry cell

9. Faraday's first law of electrolysis states that the mass of a substance deposited at an electrode is directly proportional to

A. the current

B. the time

C. the quantity of electricity passed

D. the voltage

10. The process of coating a metal with zinc to protect it from corrosion is called

A. galvanization

B. anodization

C. electroplating

D. passivation

11. In a fuel cell, the energy conversion is from

A. chemical to electrical

B. electrical to chemical

C. mechanical to electrical

D. thermal to electrical

12. The main advantage of fuel cells over traditional batteries is

A. higher efficiency

B. lower cost

C. easier maintenance

D. portability

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

A. To allow the flow of electrons

B. To maintain electrical neutrality

C. To provide a surface for the reaction

D. To increase the cell potential

14. In electrochemical cells, the movement of ions occurs through

A. the external circuit

B. the salt bridge

C. the electrolyte

D. both B and C

15. Electroplating is a process used to

A. prevent corrosion

B. improve appearance

C. increase thickness

D. all of the above

16. The electrode at which reduction occurs is called the

A. anode

B. cathode

C. salt bridge

D. electrolyte

17. Which of the following reactions occurs at the cathode in an electrolytic cell?

A. Reduction

B. Oxidation

C. Both reduction and oxidation

D. Neither reduction nor oxidation

18. What is the role of the electrolyte in an electrochemical cell?

A. To conduct electrons

B. To conduct ions

C. To act as a catalyst

D. To provide energy

19. Which gas is produced at the anode during the electrolysis of water?

A. Hydrogen

B. Oxygen

C. Chlorine

D. Nitrogen

20. 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

21. Which of the following is not a secondary cell?

A. Lead-acid battery

B. Nickel-metal hydride battery

C. Zinc-carbon battery

D. Lithium-ion battery

22. The term 'overpotential' refers to

A. the additional potential required to drive a non-spontaneous reaction

B. the equilibrium potential

C. the standard electrode potential

D. the theoretical potential

23. Which of the following substances can act as an oxidizing agent in an electrochemical cell?

A. Hydrogen

B. Chlorine

C. Zinc

D. Potassium

24. The efficiency of an electrochemical cell is determined by

A. the internal resistance

B. the cell potential

C. the type of electrodes used

D. all of the above

25. In an electrolytic cell, the anode is

A. positively charged

B. negatively charged

C. neutral

D. either positively or negatively charged

26. Which of the following is a characteristic of a reversible cell?

A. It can be recharged

B. It can only be used once

C. It has a high internal resistance

D. It undergoes a permanent chemical change

27. What happens to the cell potential when the concentration of reactants is increased?

A. It increases

B. It decreases

C. It remains the same

D. It becomes zero

28. Which of the following is an application of electrolysis?

A. Electroplating

B. Electrorefining

C. Electrolytic cleaning

D. All of the above

29. The electrochemical series is a list of elements arranged in order of their

A. atomic number

B. electrode potential

C. atomic mass

D. reactivity

30. What is the main function of a porous separator in a battery?

A. To prevent the mixing of different electrolytes

B. To increase the battery capacity

C. To allow the flow of ions while preventing short circuits

D. To act as a catalyst

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