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Formulae, functional groups and terminology past paper questions

O Level Chemistry 5070 · Organic chemistry. 1 State that a structural formula is an unambiguous description of the way the atoms in a molecule are arranged, including CH2=CH2, CH3CH2OH, CH3COOCH3 2 Draw and interpret the displayed formula of a molecule to show all the atoms and all the bonds 3 Write and interpret general formulae of compounds in the same homologous series, limited to: (a) alkanes, CnH2n+2 (b) alkenes, CnH2n (c) alcohols, CnH2n+1OH (d) carboxylic acids, CnH2n+1COOH 4 Define structural isomers as compounds with the same molecular formula, but different structural formulae, including C4H10 as CH3CH2CH2CH3 and CH3CH(CH3)CH3 and C4H8 as CH3CH2CH=CH2 and CH3CH=CHCH3 5 Identify a functional group as an atom or group of atoms that determine the chemical properties of a homologous series 6 Describe the general characteristics of a homologous series as: (a) having the same functional group (b) having the same general formul

In Cambridge O Level Chemistry 5070, Formulae, functional groups and terminology came up in 39 of the 72 papers on Paperstreak, for about 2 marks a paper when it does. It last came up in October/November 2025.

Often set with Naming organic compounds, Alkenes, Carboxylic acids, Polymers.

58 questions, newest first

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

More in Organic chemistry: Naming organic compounds, Fuels, Alkanes, Alkenes, Alcohols, Carboxylic acids, Polymers.

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