Electrochemistry: past paper questions

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• Question 12May/June 2026, paper 11Multiple choice1 mark

  Which statements about the electrolysis of dilute sulfuric acid using inert electrodes are correct?

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• Question 10Oct/Nov 2025, paper 11Multiple choice1 markHas a diagram

  Which row identifies the product at each electrode when molten zinc chloride is electrolysed using inert electrodes?

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• Question 10Oct/Nov 2024, paper 11Multiple choice1 markHas a diagram

  The diagram shows the apparatus used to electroplate a nickel shape with silver. Which row identifies the negative electrode, the positive electrode and the electrolyte?

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• Question 9Oct/Nov 2023, paper 11Multiple choice1 markHas a diagram

  What is produced at each electrode during the electrolysis of aqueous solutions using inert electrodes?

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• Question 13May/June 2026, paper 11Multiple choice1 markHas a diagram

  Fuel cells are used as energy sources in cars. Which row gives a fuel used in a fuel cell and the products formed?

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• Question 11Oct/Nov 2025, paper 11Multiple choice1 mark

  Which equation represents the reaction in a hydrogen–oxygen fuel cell?

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• Question 11Oct/Nov 2024, paper 11Multiple choice1 mark

  Concentrated aqueous sodium chloride and dilute sulfuric acid are each electrolysed separately using inert electrodes. Three statements about the electrolysis of these electrolytes are listed. 1 A gas is produced at each electrode for both electrolytes.

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• Question 10Oct/Nov 2023, paper 11Multiple choice1 mark

  Which statement about a hydrogen-oxygen fuel cell in a car is correct?

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• Question 10May/June 2026, paper 12Multiple choice1 markHas a diagram

  Which row identifies the cathode, the anode and the electrolyte when nickel is electroplated with a thin layer of silver?

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• Question 12Oct/Nov 2025, paper 12Multiple choice1 markHas a diagram

  What is the product at each electrode when molten silver iodide is electrolysed using inert electrodes?

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• Question 11Oct/Nov 2024, paper 12Multiple choice1 mark

  Three substances are listed. 1 solid copper 2 aqueous sodium bromide 3 solid lead(II) bromide Which substances conduct electricity?

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• Question 11Oct/Nov 2023, paper 12Multiple choice1 mark

  Which statement about electrolysis is correct?

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• Question 11May/June 2026, paper 12Multiple choice1 mark

  X is an insoluble binary compound. In an experiment, X is electrolysed to form two elements. Which statement describes X?

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• Question 13Oct/Nov 2025, paper 12Multiple choice1 markHas a diagram

  Which row describes a product at each electrode when dilute sulfuric acid is electrolysed using inert electrodes?

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• Question 12Oct/Nov 2024, paper 12Multiple choice1 mark

  Hydrogen–oxygen fuel cells can be used to power cars. Which processes produce the fuel of a hydrogen–oxygen fuel cell?

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• Question 12Oct/Nov 2023, paper 12Multiple choice1 mark

  Which statements about hydrogen-oxygen fuel cells are correct?

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• Question 12May/June 2026, paper 12Multiple choice1 mark

  Which statement about a fuel cell in a car is correct?

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• Question 12Oct/Nov 2025, paper 13Multiple choice1 mark

  Which statements explain why metal objects are electroplated?

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• Question 13Oct/Nov 2024, paper 12Multiple choice1 markHas a diagram

  Molten sodium sulfide, ${\text{Na}}_2\text{S}$, is electrolysed using inert electrodes. Which row identifies the product at each electrode?

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• Question 10Oct/Nov 2023, paper 13Multiple choice1 mark

  Dilute sulfuric acid is electrolysed using platinum electrodes. The gases produced at each electrode are collected. The gases are mixed together and ignited with a lighted splint.

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• Question 11May/June 2026, paper 13Multiple choice1 mark

  Substance X is electrolysed.

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• Question 13Oct/Nov 2025, paper 13Multiple choice1 mark

  Three statements about a hydrogen–oxygen fuel cell are listed. 1 The overall equation for the reaction is $2{\text{H}}_2+{\text{O}}_2\to 2{\text{H}}_2\text{O}$. 2 The hydrogen required comes from the air.

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• Question 11Oct/Nov 2024, paper 13Multiple choice1 mark

  What is the definition of electrolysis?

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• Question 11Oct/Nov 2023, paper 13Multiple choice1 mark

  Electricity is passed through molten sodium chloride using inert electrodes. What is observed at the electrodes?

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• Question 12May/June 2026, paper 13Multiple choice1 markHas a diagram

  An iron pan is electroplated with copper. The apparatus for the electroplating is shown. Which row identifies the metal electrode and the electrolyte?

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• Question 12Oct/Nov 2025, paper 21Multiple choice1 mark

  Aqueous copper(II) sulfate is electrolysed using copper electrodes. Which statement is correct?

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• Question 12Oct/Nov 2024, paper 13Multiple choice1 mark

  Which statement about electroplating a copper spoon with silver is correct?

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• Question 13May/June 2026, paper 13Multiple choice1 mark

  Four statements about hydrogen fuel cells are listed. 1 Carbon dioxide and water are produced in the fuel cell. 2 In the fuel cell, hydrogen combines with oxygen.

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• Question 13Oct/Nov 2025, paper 21Multiple choice1 markHas a diagram

  Which row describes the reactions during the electrolysis of dilute aqueous sodium chloride?

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• Question 11Oct/Nov 2024, paper 21Multiple choice1 markHas a diagram

  The apparatus used for electrolysis is shown. Which statement is correct?

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