Opening Paperstreak

O Level Chemistry past papers › Topics

Electrolysis past paper questions

O Level Chemistry 5070 · Electrochemistry. 1 Define electrolysis as the decomposition of an ionic compound, when molten or in aqueous solution, by the passage of an electric current 2 Identify in simple electrolytic cells: (a) the anode as the positive electrode (b) the cathode as the negative electrode (c) the electrolyte as the molten or aqueous substance that undergoes electrolysis 3 Describe the transfer of charge during electrolysis to include: (a) the movement of electrons in the external circuit (b) the loss or gain of electrons at the electrodes (c) the movement of ions in the electrolyte 4 Identify the products formed at the electrodes and describe the observations made during the electrolysis of: (a) molten lead(II) bromide (b) concentrated aqueous sodium chloride (c) dilute sulfuric acid using inert electrodes made of platinum or carbon / graphite 5 Identify the products formed at the electrodes and describe the observ

In Cambridge O Level Chemistry 5070, Electrolysis came up in 52 of the 72 papers on Paperstreak, for about 3 marks a paper when it does. It last came up in October/November 2025.

Often set with Identification of ions and gases, The mole and the Avogadro constant, Ion and ionic bonds, Redox.

72 questions, newest first

  1. 5070/11/O/N/25 Question 12 · 1 mark
  2. 5070/12/O/N/25 Question 11 · 1 mark
  3. 5070/21/O/N/25 Question 9 part (e) · 4 marks
  4. 5070/22/O/N/25 Question 9 part (d) · 4 marks
  5. 5070/11/M/J/25 Question 14 · 1 mark
  6. 5070/11/M/J/25 Question 15 · 1 mark
  7. 5070/12/M/J/25 Question 12 · 1 mark
  8. 5070/12/M/J/25 Question 13 · 1 mark
  9. 5070/21/M/J/25 Question 2 parts (b) (c) · 4 marks
  10. 5070/22/M/J/25 Question 2 parts (b) (c) (d) · 6 marks
  11. 5070/11/O/N/24 Question 11 · 1 mark
  12. 5070/12/O/N/24 Question 12 · 1 mark
  13. 5070/12/O/N/24 Question 13 · 1 mark
  14. 5070/21/O/N/24 Question 3 parts (a) (b) (c(i)) (c(ii)) (e) · 5 marks
  15. 5070/22/O/N/24 Question 3 · 6 marks
  16. 5070/41/O/N/24 Question 1 · 6 marks
  17. 5070/11/M/J/24 Question 12 · 1 mark
  18. 5070/11/M/J/24 Question 13 · 1 mark
  19. 5070/12/M/J/24 Question 11 · 1 mark
  20. 5070/12/M/J/24 Question 12 · 1 mark
  21. 5070/21/M/J/24 Question 4 part (c) · 2 marks
  22. 5070/22/M/J/24 Question 4 part (c) · 2 marks
  23. 5070/11/O/N/23 Question 12 · 1 mark
  24. 5070/12/O/N/23 Question 12 · 1 mark
  25. 5070/21/O/N/23 Question 4 parts (a) (b) · 4 marks
  26. 5070/22/O/N/23 Question 4 parts (a) (b) · 4 marks
  27. 5070/42/O/N/23 Question 1 parts (b) (d) · 3 marks
  28. 5070/11/M/J/23 Question 11 · 1 mark
  29. 5070/12/M/J/23 Question 12 · 1 mark
  30. 5070/21/M/J/23 Question 8 · 6 marks
  31. 5070/22/M/J/23 Question 8 parts (a) (c) · 4 marks
  32. 5070/11/O/N/22 Question 17 · 1 mark
  33. 5070/11/O/N/22 Question 18 · 1 mark
  34. 5070/11/O/N/22 Question 19 · 1 mark
  35. 5070/12/O/N/22 Question 16 · 1 mark
  36. 5070/12/O/N/22 Question 17 · 1 mark
  37. 5070/21/O/N/22 Question 5 part (e(ii)) · 2 marks
  38. 5070/21/O/N/22 Question 9 part (b) · 1 mark
  39. 5070/22/O/N/22 Question 5 part (c(i)) · 2 marks
  40. 5070/22/O/N/22 Question 9 parts (c) (d) · 2 marks
  41. 5070/41/O/N/22 Question 2 part (a) · 5 marks
  42. 5070/41/O/N/22 Question 7 parts (b) (c(i)) (c(ii)) · 5 marks
  43. 5070/42/O/N/22 Question 2 part (b) · 4 marks
  44. 5070/11/M/J/22 Question 16 · 1 mark
  45. 5070/12/M/J/22 Question 16 · 1 mark
  46. 5070/21/M/J/22 Question 5 part (c) · 1 mark
  47. 5070/22/M/J/22 Question 8 part (c) · 2 marks
  48. 5070/11/O/N/21 Question 14 · 1 mark
  49. 5070/11/O/N/21 Question 15 · 1 mark
  50. 5070/12/O/N/21 Question 14 · 1 mark
  51. 5070/12/O/N/21 Question 15 · 1 mark
  52. 5070/21/O/N/21 Question 9 part (c) · 1 mark
  53. 5070/22/O/N/21 Question 9 parts (b(i)) (b(ii)) · 3 marks
  54. 5070/11/M/J/21 Question 13 · 1 mark
  55. 5070/11/M/J/21 Question 14 · 1 mark
  56. 5070/11/M/J/21 Question 15 · 1 mark
  57. 5070/12/M/J/21 Question 14 · 1 mark
  58. 5070/12/M/J/21 Question 15 · 1 mark
  59. 5070/21/M/J/21 Question 8 parts (e(i)) (e(ii)) (e(iii)) · 3 marks
  60. 5070/22/M/J/21 Question 8 part (f) · 1 mark
  61. 5070/11/O/N/20 Question 18 · 1 mark
  62. 5070/11/O/N/20 Question 19 · 1 mark
  63. 5070/12/O/N/20 Question 18 · 1 mark
  64. 5070/12/O/N/20 Question 19 · 1 mark
  65. 5070/21/O/N/20 Question 3 parts (c(i)) (c(ii)) · 4 marks
  66. 5070/22/O/N/20 Question 2 parts (c(i)) (c(ii)) (c(iii)) (c(iv)) (d) · 5 marks
  67. 5070/22/O/N/20 Question 4 part (e(i)) · 1 mark
  68. 5070/41/O/N/20 Question 4 · 5 marks
  69. 5070/42/O/N/20 Question 1 part (a) · 5 marks
  70. 5070/11/M/J/20 Question 16 · 1 mark
  71. 5070/12/M/J/20 Question 16 · 1 mark
  72. 5070/12/M/J/20 Question 17 · 1 mark

More in Electrochemistry: Hydrogen–oxygen fuel cells.

Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.