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Oxidation numbers past paper questions

Chemistry 9701 · Electrochemistry. Working them out, and Roman numerals in names

It came up in 65 of 139 papers, for about 1 marks a paper when it does. It last came up in October/November 2025.

Often set with Structure and properties, Oxidation and reduction, Formulas, Period 3 chlorides with water.

68 questions, newest first

1. 9701/12/O/N/25 Question 11 · 1 mark
2. 9701/21/O/N/25 Question 1 part (c(ii)) · 1 mark
3. 9701/22/O/N/25 Question 1 part (c(ii)) · 1 mark
4. 9701/23/O/N/25 Question 1 part (c(ii)) · 1 mark
5. 9701/12/M/J/25 Question 5 · 1 mark
6. 9701/13/M/J/25 Question 4 · 1 mark
7. 9701/21/M/J/25 Question 1 part (d) · 2 marks
8. 9701/12/F/M/25 Question 14 · 1 mark
9. 9701/22/F/M/25 Question 1 part (a(i)) · 2 marks
10. 9701/22/O/N/24 Question 3 part (b(i)) · 1 mark
11. 9701/11/M/J/24 Question 11 · 1 mark
12. 9701/12/M/J/24 Question 11 · 1 mark
13. 9701/13/M/J/24 Question 11 · 1 mark
14. 9701/13/M/J/24 Question 22 · 1 mark
15. 9701/21/M/J/24 Question 2 part (c(i)) · 1 mark
16. 9701/23/M/J/24 Question 1 part (d(i)) · 1 mark
17. 9701/22/F/M/24 Question 1 part (c(i)) · 1 mark
18. 9701/12/O/N/23 Question 13 · 1 mark
19. 9701/13/M/J/23 Question 14 · 1 mark
20. 9701/12/F/M/23 Question 6 · 1 mark
21. 9701/11/O/N/22 Question 11 · 1 mark
22. 9701/12/O/N/22 Question 5 · 1 mark
23. 9701/12/O/N/22 Question 6 · 1 mark
24. 9701/13/O/N/22 Question 11 · 1 mark
25. 9701/11/M/J/22 Question 12 · 1 mark
26. 9701/12/M/J/22 Question 12 · 1 mark
27. 9701/22/M/J/22 Question 1 part (b(i)) · 1 mark
28. 9701/22/F/M/22 Question 2 part (c(ii)) · 1 mark
29. 9701/12/O/N/21 Question 10 · 1 mark
30. 9701/21/O/N/21 Question 3 part (b(i)) · 1 mark
31. 9701/23/O/N/21 Question 3 part (b(i)) · 1 mark
32. 9701/11/M/J/21 Question 9 · 1 mark
33. 9701/22/F/M/21 Question 2 part (c(ii)) · 1 mark
34. 9701/11/O/N/20 Question 8 · 1 mark
35. 9701/12/O/N/20 Question 1 · 1 mark
36. 9701/13/O/N/20 Question 8 · 1 mark
37. 9701/21/O/N/20 Question 2 part (d(ii)) · 1 mark
38. 9701/23/O/N/20 Question 2 part (d(ii)) · 1 mark
39. 9701/11/M/J/20 Question 2 · 1 mark
40. 9701/12/M/J/20 Question 10 · 1 mark
41. 9701/13/M/J/20 Question 10 · 1 mark
42. 9701/21/M/J/20 Question 2 part (a(ii)) · 1 mark
43. 9701/22/M/J/20 Question 2 part (c(i)) · 2 marks
44. 9701/23/M/J/20 Question 1 part (c(ii)) · 1 mark
45. 9701/12/F/M/20 Question 5 · 1 mark
46. 9701/22/F/M/20 Question 1 part (g(i)) · 1 mark
47. 9701/11/O/N/19 Question 6 · 1 mark
48. 9701/12/O/N/19 Question 8 · 1 mark
49. 9701/13/O/N/19 Question 6 · 1 mark
50. 9701/13/M/J/19 Question 1 · 1 mark
51. 9701/22/M/J/19 Question 3 part (b(i)) · 2 marks
52. 9701/22/F/M/19 Question 1 part (d(i)) · 1 mark
53. 9701/12/O/N/18 Question 8 · 1 mark
54. 9701/13/O/N/18 Question 7 · 1 mark
55. 9701/21/O/N/18 Question 1 part (a(ii)) · 1 mark
56. 9701/23/O/N/18 Question 1 part (a(ii)) · 1 mark
57. 9701/12/F/M/18 Question 18 · 1 mark
58. 9701/12/F/M/18 Question 36 · 1 mark
59. 9701/11/O/N/17 Question 33 · 1 mark
60. 9701/12/O/N/17 Question 33 · 1 mark
61. 9701/13/O/N/17 Question 33 · 1 mark
62. 9701/11/M/J/17 Question 8 · 1 mark
63. 9701/12/M/J/17 Question 8 · 1 mark
64. 9701/13/M/J/17 Question 8 · 1 mark
65. 9701/12/F/M/17 Question 33 · 1 mark
66. 9701/11/M/J/16 Question 33 · 1 mark
67. 9701/12/M/J/16 Question 9 · 1 mark
68. 9701/12/F/M/16 Question 1 · 1 mark

More in Electrochemistry: Balancing redox equations, Oxidation and reduction.

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