Electrolysis: 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 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 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 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 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 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 12Oct/Nov 2025, paper 13Multiple choice1 mark

  Which statements explain why metal objects are electroplated?

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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 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 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 8Oct/Nov 2023, paper 21Multiple choice1 markHas a diagram

  Which statements about hydrogen and oxygen are correct?

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• Question 12May/June 2026, paper 21Multiple choice1 markHas a diagram

  Concentrated aqueous sodium chloride and dilute sulfuric acid are electrolysed with inert electrodes. Which row describes the electrode products for each electrolyte?

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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 13Multiple choice1 mark

  What is the definition of electrolysis?

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• Question 28Oct/Nov 2023, paper 21Multiple choice1 markHas a diagram

  Aluminium is extracted from purified bauxite by electrolysis. Which row shows the ionic half-equations for the reaction at each electrode?

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• Question 13May/June 2026, paper 21Multiple choice1 markHas a diagram

  Which diagram shows the direction of movement of ions and electrons during the electrolysis of molten sodium chloride?

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• Question 29Oct/Nov 2025, paper 21Multiple choice1 mark

  Which statement about the extraction of aluminium by electrolysis 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 10Oct/Nov 2023, paper 22Multiple choice1 markHas a diagram

  Dilute aqueous potassium chloride is electrolysed using platinum electrodes. Which row identifies the product at each electrode?

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• Question 11May/June 2026, paper 22Multiple choice1 markHas a diagram

  The apparatus shown is used to electroplate a copper spoon with silver. Which row is correct?

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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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