Lesson 14.2.1

14.2.1 Storage cells and hydrogen-oxygen fuel cells Quiz: Pearson Edexcel Chemistry, Unit 14

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 14.2.1, Storage cells and hydrogen-oxygen fuel cells: 20 multiple choice questions for the Pearson Edexcel Chemistry (9CH0), Unit 14: Redox II, written with Revision Ninja.

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The 20 questions

  1. How is an electrical storage cell best described?

    • Fuel cell
    • Rechargeable cell
    • Non-rechargeable cell
    • Primary cell

  2. What electrolyte is used in a standard lead-acid storage cell?

    • Sulfuric acid
    • Sodium hydroxide
    • Nitric acid
    • Hydrochloric acid

  3. What happens to the electrolyte concentration when a lead-acid cell discharges?

    • It increases
    • It reaches zero
    • It remains constant
    • It decreases

  4. How does a hydrogen-oxygen fuel cell continuously produce electricity?

    • Thermal heating
    • Consuming solid electrodes
    • Continuous fuel supply
    • Recharging with electricity

  5. What is the only product of a hydrogen-oxygen fuel cell in its overall reaction?

    • Ammonia
    • Hydrogen peroxide
    • Carbon dioxide
    • Water

  6. What is the anode reaction of a hydrogen-oxygen fuel cell with an acidic electrolyte?

    • 2H+ + 2e- gives H2
    • H2O gives O2 + 4H+ + 4e-
    • O2 + 4H+ + 4e- gives 2H2O
    • H2 gives 2H+ + 2e-

  7. What is the approximate emf of one lead-acid cell?

    • About 2.0 V
    • About 1.2 V
    • About 4.5 V
    • About 0.8 V

  8. What is the cathode reaction in an acidic hydrogen-oxygen fuel cell?

    • H2 gives 2H+ + 2e-
    • O2 + 4H+ + 4e- gives 2H2O
    • 2H2O gives O2 + 4H+ + 4e-
    • O2 + 2H2O + 4e- gives 4OH-

  9. What is the anode reaction in an alkaline hydrogen-oxygen fuel cell?

    • 2H+ + 2e- gives H2
    • O2 + 2H2O + 4e- gives 4OH-
    • H2 + 2OH- gives 2H2O + 2e-
    • H2O + e- gives OH- + H

  10. What is the theoretical emf of a hydrogen-oxygen fuel cell at standard conditions?

    • 2.46 V
    • 1.23 V
    • 0.00 V
    • -1.23 V

  11. Which of these is a hydrogen-rich fuel used in fuel cells?

    • Methanol, CH3OH
    • Nitrogen gas
    • Argon
    • Neon

  12. During recharging of a lead-acid cell, what is reduced at the cathode?

    • Lead(II) sulfate
    • Lead(IV) oxide
    • Lead metal
    • Sulfuric acid

  13. Why are fuel cells generally more efficient than internal combustion engines?

    • Direct energy conversion
    • Higher working temperatures
    • Thermal energy conversion
    • Use of catalysts

  14. In a hydrogen-oxygen fuel cell, in which direction do electrons flow through the external circuit?

    • Cathode to anode
    • Cathode to electrolyte
    • Electrolyte to electrode
    • Anode to cathode

  15. Using E-zero(O2/OH-) = +0.40 V and E-zero(H2O/H2) = -0.83 V, what is the emf of an alkaline hydrogen-oxygen fuel cell?

    • -0.43 V
    • +1.23 V
    • +2.46 V
    • +0.43 V

  16. How many moles of electrons are transferred per mole of oxygen gas in a fuel cell?

    • 4
    • 2
    • 8
    • 1

  17. What happens to the sulfuric acid concentration during lead-acid cell discharge?

    • Fluctuates
    • Increases
    • Decreases
    • Remains constant

  18. What is the only chemical product formed at the point of use in a hydrogen-oxygen fuel cell?

    • Water
    • Nitrogen oxide
    • Carbon dioxide
    • Hydrogen peroxide

  19. What is the overall reaction of a hydrogen-oxygen fuel cell?

    • 2H2O gives 2H2 + O2
    • H2 + O2 gives H2O2
    • H2 + O2 gives 2OH-
    • 2H2 + O2 gives 2H2O

  20. How many moles of electrons flow through the external circuit when 2.0 mol of H2 is consumed in a hydrogen-oxygen fuel cell?

    • 8.0 mol
    • 4.0 mol
    • 1.0 mol
    • 2.0 mol

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