1. An electrochemical cell that uses electrical energy to drive a chemical reaction is a(n)
Answer: B. electrolytic cell
Chemistry Class 10 Unit 4: Electrochemistry MCQs
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2. An electrochemical cell that converts chemical energy into electricity is a(n)
Answer: C. galvanic cell
3. A substance that conducts electricity in molten state or aqueous solution and undergoes chemical change is a(n)
Answer: A. electrolyte
4. Electrolysis is the decomposition of ionic compounds by
Answer: D. passage of electric current
5. In an electrolytic cell, oxidation occurs at the
Answer: C. anode
6. In an electrolytic cell, reduction occurs at the
Answer: A. cathode
7. In the external circuit of an electrolytic cell, electrons move from the
Answer: D. anode to the cathode
8. Sodium metal is produced industrially by the electrolysis of fused sodium chloride in
Answer: B. Down's cell
9. Down's cell uses
Answer: A. an iron cathode and a carbon anode
10. During electrolysis of molten NaCl, the half-reaction at the anode is
Answer: D. 2Cl⁻ → Cl₂ + 2e⁻
11. During electrolysis of molten NaCl, the half-reaction at the cathode is
Answer: C. Na⁺ + e⁻ → Na
12. Electrolysis of molten lead(II) chloride gives lead at the cathode and ______ at the anode.
Answer: B. chlorine gas
13. Electrolysis of concentrated aqueous NaCl (brine) is used to produce
Answer: B. sodium hydroxide
14. In the electrolysis of concentrated aqueous NaCl, chlorine gas is produced at the
Answer: D. anode
15. In the electrolysis of concentrated aqueous NaCl, hydrogen gas is produced at the
Answer: C. cathode
16. In electrolysis of dilute aqueous NaCl using platinum electrodes, the gas produced at the anode is
Answer: A. oxygen
17. In the electrolysis of aqueous CuSO₄ with platinum electrodes, the product at the cathode is
Answer: B. copper metal
18. In the electrolysis of aqueous CuSO₄ with platinum electrodes, the product at the anode is
Answer: C. oxygen gas
19. During electrolysis of CuSO₄ with copper electrodes, the anode reaction is
Answer: D. Cu → Cu²⁺ + 2e⁻
20. In the purification of copper, the impure copper acts as the
Answer: A. anode
21. In copper refining, silver and gold impurities
Answer: D. fall to the bottom of the cell
22. In electrolysis of a concentrated halide solution, the product at the anode is
Answer: C. the halogen
23. The electrolytic process used to deposit one metal on another is called
Answer: A. electroplating
24. In electroplating, the object to be plated is made the
Answer: B. cathode
25. In electroplating, the plating metal is made the
Answer: A. anode
26. Galvanizing is coating of steel with
Answer: D. zinc
27. Tin-plated steel is used to make food cans because tin plating is
Answer: B. non-poisonous and prevents corrosion
28. A galvanic cell is also called a
Answer: C. voltaic cell
29. In a Daniel cell, the zinc half-cell acts as the
Answer: C. anode
30. In a Daniel cell, the copper half-cell acts as the
Answer: B. cathode
31. In a Daniel cell, electrons flow from the
Answer: D. zinc rod to the copper rod through the external wire
32. A salt bridge contains
Answer: A. an inert electrolyte such as KCl
33. In a voltaic cell, the salt bridge
Answer: C. maintains electrical neutrality by allowing ion movement
34. The oxidation half-reaction in a Daniel cell is
Answer: D. Zn → Zn²⁺ + 2e⁻
35. The reduction half-reaction in a Daniel cell is
Answer: B. Cu²⁺ + 2e⁻ → Cu
36. Which statement is NOT correct for a galvanic cell?
Answer: A. Electrons flow from the cathode to the anode
37. Which statement is NOT true about the Daniel cell?
Answer: B. The half-cell of an active metal acts as a cathode
38. Which of the following does NOT involve an electrolytic process?
Answer: A. Reduction of a metal oxide by a reducing agent
39. A table of metals arranged by increasing reduction potentials is called the
Answer: D. electrochemical series
40. A metal with a lower reduction potential is
Answer: C. more active (more easily oxidised)
41. In a voltaic cell, the electrode with the lower reduction potential acts as the
Answer: C. anode
42. If metal A has a higher standard reduction potential than metal B, then
Answer: D. metal B is more reactive than metal A
43. In dilute aqueous NaCl, OH⁻ ions are discharged at the anode instead of Cl⁻ because of
Answer: A. concentration effect and overpotential of chlorine
44. A hydrogen-oxygen fuel cell converts the energy of the reaction between hydrogen and oxygen into
Answer: B. electrical energy
45. The electrodes in a hydrogen-oxygen fuel cell are porous carbon containing ______ as catalyst.
Answer: D. platinum
46. In a hydrogen-oxygen fuel cell, the only chemical product is
Answer: A. water
47. An advantage of fuel cells over petrol engines is that they
Answer: B. emit only water vapour and do not pollute
About Chemistry Class 10 Unit 4 MCQs (Federal Board)
These 47 Chemistry MCQs cover Class 10 Unit 4: Electrochemistry of the Federal Board (FBISE) SSC-II (Class 10) syllabus. They are SLO-based MCQs as per the new pattern for FBISE exams. Each question has four options and the correct answer is shown, so you can practise for the annual examination and find the topics you still need to revise. You can also read the Electrochemistry notes for this chapter. Download the Electrochemistry MCQs as a PDF using the button at the top of this page.