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Class 12 Chemistry: Electrochemistry
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MCQs on electrochemical cells, galvanic cells, nernst equation, electrolytic cells and solutions, electrolysis, batteries, fuel cells and corrosion.
 

Class 12 Chemistry: Electrochemistry
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25 Questions

1. Which of the following salts show maximum value of equivalent conductance in their fused state?
2. Which of the following is a correct method to calculate the EMF of a galvanic cell?
3. Which of the following is not essential for rusting to take place?
4. The standard oxidation potential of Ni/Ni2+ electrode is 0.3 V. If this is combined with a hydrogen electrode in acid solution, at what pH of the solution with the measured e.m.f. be zero at 25°C? (Assume [Ni2+] = 1M)
5. What is the role of manganese dioxide in a dry cell?
6. Which of the following solutions has theleast value of conductivity?
7. What is the final product that zinc forms during the functioning of a mercury cell?
8. Which of the following statements is correct regarding the conductivity of solutions of electrolytes?
9. What is the product formed at the cathode in the electrolysis of aqueous Na2SO4?
10. Which of the following conditions are satisfied when the cell reaction in the electrochemical cell is spontaneous?
11. Calculate the electrode potential of the given electrode.
Pt, Cl2(2 bar)| 2Cl–(0.02 M); E°(Cl2 | 2Cl–) = 3.4 V
12. Which of the following appliances would not use sodium hydroxide as an electrolyte in their mercury cells?
13. What is the EMF of a galvanic cell if the standard oxidation potential of the oxidation half-reaction is 0.64 volts and the standard reduction potential of the reduction half-reaction is 0.48 volts?
14. Which of the following conditions are satisfied when the electrolytic solutions are infinitely dilute?
15. What is the direction of flow of electrons in an electrolytic cell?
16. Which of the following is the voltage output of a mercury cell?
17. Which of the following is the overall reaction of rusting?
18. Which of the following is the electrolyte used in a dry cell?
19. Which of the following factors does not affect the electrode potential of an electrode?
20. What is the maximum theoretical energy efficiency of a fuel cell?
21. Which of the following is false regarding galvanic cells?
22. Which of the following products are formed when a lead storage battery is discharged?
23. Which of the following is not a method of prevention of corrosion?
24. The e.m.f and the standard e.m.f of a cell in the following reaction is 5 V and 5.06 V at room temperature, Ni(s) + 2Ag+(n) → Ni2+(0.02M) + 2Ag(s). What is the concentration of Ag+ ions?
25. Which of the following is the correct order of reactivity of metals?

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