Electrochemistry MCQ Set 5

Explore this diverse selection of multiple-choice questions (MCQs) designed for various examinations. Electrochemistry MCQ Set 5 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 characteristic of a primary cell?

A. It cannot be recharged

B. It has a longer lifespan than secondary cells

C. It can be used multiple times

D. It has a higher capacity than secondary cells

2. What is the main purpose of a 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

3. What is the function of a cathode in a fuel cell?

A. Oxidation of hydrogen

B. Reduction of oxygen

C. Oxidation of oxygen

D. Reduction of hydrogen

4. In the electrolysis of molten lead(II) bromide, what is formed at the cathode?

A. Lead

B. Bromine

C. Hydrogen

D. Oxygen

5. Which of the following ions is discharged at the anode during the electrolysis of aqueous copper(II) sulfate solution using copper electrodes?

A. Sulfate ions

B. Hydroxide ions

C. Copper ions

D. Hydrogen ions

6. What is the electrode potential of silver?

A. +0.80 V

B. +1.50 V

C. -0.40 V

D. +0.34 V

7. What is the principle behind the working of a Daniell cell?

A. Precipitation reaction

B. Acid-base reaction

C. Redox reaction

D. Neutralization reaction

8. In an electrolytic cell, what is the role of the electrolyte?

A. To conduct ions

B. To conduct electrons

C. To act as a catalyst

D. To separate the electrodes

9. Which of the following is a common use of electrolysis?

A. Electroplating

B. Fractional distillation

C. Filtration

D. Crystallization

10. In a galvanic cell, where does the reduction half-reaction occur?

A. At the cathode

B. At the anode

C. In the electrolyte

D. In the salt bridge

11. What is the main disadvantage of using lead-acid batteries?

A. Low energy density

B. High cost

C. Short lifespan

D. High internal resistance

12. What is the standard reduction potential for the reduction of zinc ions to zinc metal?

A. -0.76 V

B. +0.34 V

C. +0.76 V

D. -1.10 V

13. What is the main application of a potentiometric titration?

A. Determining the concentration of a solution

B. Measuring the current

C. Measuring the resistance

D. Measuring the capacitance

14. Which gas is produced at the cathode during the electrolysis of water?

A. Hydrogen

B. Oxygen

C. Chlorine

D. Nitrogen

15. What is the purpose of a standard hydrogen electrode?

A. To serve as a reference electrode

B. To act as a catalyst

C. To increase the cell potential

D. To separate the electrodes

16. In a galvanic cell, what is the role of the anode?

A. Site of oxidation

B. Site of reduction

C. Both oxidation and reduction

D. Neither oxidation nor reduction

17. Which of the following metals is least likely to corrode?

A. Gold

B. Iron

C. Copper

D. Zinc

18. What is the unit of the Faraday constant?

A. Coulombs per mole

B. Joules per mole

C. Volts per mole

D. Amperes per mole

19. During the electrolysis of brine, which gas is produced at the anode?

A. Chlorine

B. Hydrogen

C. Oxygen

D. Nitrogen

20. What is the function of a porous separator in a lead-acid battery?

A. To prevent short circuits

B. To increase capacity

C. To act as a catalyst

D. To conduct electricity

21. In the electrolysis of molten sodium chloride, what is the product at the cathode?

A. Sodium metal

B. Chlorine gas

C. Hydrogen gas

D. Oxygen gas

22. Which of the following is an example of a redox reaction?

A. Combustion

B. Neutralization

C. Precipitation

D. Dissolution

23. What is the standard electrode potential of a copper electrode?

A. +0.34 V

B. +0.76 V

C. -0.76 V

D. +1.50 V

24. In a fuel cell, which substance is commonly used as the fuel?

A. Hydrogen

B. Oxygen

C. Methane

D. Carbon dioxide

25. What is the term used for the electrode where reduction occurs in an electrochemical cell?

A. Cathode

B. Anode

C. Electrolyte

D. Salt bridge

26. What is the main advantage of a lithium-ion battery over a nickel-cadmium battery?

A. Higher energy density

B. Lower cost

C. Easier to recycle

D. Higher voltage

27. In the electrolysis of aqueous copper(II) sulfate solution using copper electrodes, what happens to the mass of the anode?

A. It decreases

B. It increases

C. It remains the same

D. It fluctuates

28. What is the role of a salt bridge in a voltaic 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

29. Which of the following is a secondary cell?

A. Lead-acid battery

B. Alkaline battery

C. Zinc-carbon battery

D. Dry cell

30. What is the purpose of the Nernst equation in electrochemistry?

A. To calculate cell potential at non-standard conditions

B. To measure the current

C. To measure the resistance

D. To measure the capacitance

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