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Carbon compounds as fuels and feedstock: AQA GCSE Chemistry questions

Every AQA GCSE Chemistry exam question on 4.7.1 Carbon compounds as fuels and feedstock, 2018–2025, with its mark scheme and examiner’s report.

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1,744 questions

  1. Q02.1

    June 2025 · Paper 2 Higher

    1 mark4.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes4.7.1 Carbon compounds as fuels and feedstock
    The whole paper ↗
    June 2025 Paper 2 Higher, question 02.1: Name the process represented by Figure 1. [1 mark]

  2. Q02.2

    June 2025 · Paper 2 Higher

    2 marks4.2.2 How bonding and structure are related to the properties of substances4.7.1 Carbon compounds as fuels and feedstock
    The whole paper ↗
    June 2025 Paper 2 Higher, question 02.2: Changes of state take place during the process in Figure 1. Name the change of state taking place in: • the heater • the column. [2 marks] Heater Column

  3. Q02.3

    June 2025 · Paper 2 Higher

    1 mark4.7.1 Carbon compounds as fuels and feedstock
    The whole paper ↗
    June 2025 Paper 2 Higher, question 02.3: Which fuel is obtained at B in the column? Use Figure 1 and Table 2. [1 mark]

  4. Q02.4

    June 2025 · Paper 2 Higher

    1 mark4.7.1 Carbon compounds as fuels and feedstock
    The whole paper ↗
    June 2025 Paper 2 Higher, question 02.4: Fuels with higher boiling point ranges contain larger molecules. What is the order of increasing flammability of the fuels? Use Table 2. [1 mark] Tick () one b

  5. Q02.5

    June 2025 · Paper 2 Higher

    1 mark4.2.1 Chemical bonds, ionic, covalent and metallic4.7.1 Carbon compounds as fuels and feedstock
    The whole paper ↗
    June 2025 Paper 2 Higher, question 02.5: Write the molecular formula of the hydrocarbon represented by the model in Figure 2. [1 mark]

  6. Q02.6

    June 2025 · Paper 2 Higher

    1 mark4.7.1 Carbon compounds as fuels and feedstock
    The whole paper ↗
    June 2025 Paper 2 Higher, question 02.6: Name the hydrocarbon represented by the model in Figure 2. [1 mark]

  7. Q05.1

    June 2025 · Paper 2 Higher

    1 mark4.7.1 Carbon compounds as fuels and feedstock
    The whole paper ↗
    June 2025 Paper 2 Higher, question 05.1: Table 6 shows the boiling points of some unsaturated hydrocarbons. Table 6 Formula of unsaturated hydrocarbon Boiling point in °C C2H4 – 104 C3H6 – 47 C4H8 X C5

  8. Q02.2

    June 2025 · Paper 2 Foundation

    1 mark4.7.1 Carbon compounds as fuels and feedstock
    Mark scheme (PDF)
    The whole paper ↗
    June 2025 Paper 2 Foundation, question 02.2: How many atoms are there in a molecule of C3H6? [1 mark] Tick () one box. 2 3 6 9

  9. Q02.3

    June 2025 · Paper 2 Foundation

    1 mark4.7.1 Carbon compounds as fuels and feedstock
    The whole paper ↗
    June 2025 Paper 2 Foundation, question 02.3: Which is a use of C3H6? [1 mark] Tick () one box. Making a polymer Making ammonia Making glass

  10. Q02.5

    June 2025 · Paper 2 Foundation

    2 marks4.7.1 Carbon compounds as fuels and feedstock
    The whole paper ↗
    June 2025 Paper 2 Foundation, question 02.5: Describe a test for alkenes. Give the result of the test. [2 marks] Test Result

  11. Q02.6

    June 2025 · Paper 2 Foundation

    1 mark4.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes4.7.1 Carbon compounds as fuels and feedstock
    The whole paper ↗
    June 2025 Paper 2 Foundation, question 02.6: C10H22 can be cracked to produce C3H6 and an alkane. Complete the equation for the reaction. [1 mark] C10H22 ⟶ C3H6 + C H16

  12. Q02.7

    June 2025 · Paper 2 Foundation

    1 mark4.7.1 Carbon compounds as fuels and feedstock
    The whole paper ↗
    June 2025 Paper 2 Foundation, question 02.7: Complete the sentence. Choose the answer from the box. [1 mark] Smaller alkanes from cracking are useful as . ceramics fertilisers fuels

  13. Q09.1

    June 2025 · Paper 2 Foundation

    1 mark4.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes4.7.1 Carbon compounds as fuels and feedstock
    The whole paper ↗
    June 2025 Paper 2 Foundation, question 09.1: Name the process represented by Figure 7. [1 mark]

  14. Q09.2

    June 2025 · Paper 2 Foundation

    2 marks4.2.2 How bonding and structure are related to the properties of substances4.7.1 Carbon compounds as fuels and feedstock
    The whole paper ↗
    June 2025 Paper 2 Foundation, question 09.2: Changes of state take place during the process in Figure 7. Name the change of state taking place in: • the heater • the column. [2 marks] Heater Column

  15. Q09.3

    June 2025 · Paper 2 Foundation

    1 mark4.7.1 Carbon compounds as fuels and feedstock
    The whole paper ↗
    June 2025 Paper 2 Foundation, question 09.3: Which fuel is obtained at B in the column? Use Figure 7 and Table 4. [1 mark]

  16. Q09.4

    June 2025 · Paper 2 Foundation

    1 mark4.7.1 Carbon compounds as fuels and feedstock
    The whole paper ↗
    June 2025 Paper 2 Foundation, question 09.4: Fuels with higher boiling point ranges contain larger molecules. What is the order of increasing flammability of the fuels? Use Table 4. [1 mark] Tick () one b

  17. Q09.5

    June 2025 · Paper 2 Foundation

    1 mark4.2.1 Chemical bonds, ionic, covalent and metallic4.7.1 Carbon compounds as fuels and feedstock
    The whole paper ↗
    June 2025 Paper 2 Foundation, question 09.5: Write the molecular formula of the hydrocarbon represented by the model in Figure 8. [1 mark]

  18. Q09.6

    June 2025 · Paper 2 Foundation

    1 mark4.7.1 Carbon compounds as fuels and feedstock
    The whole paper ↗
    June 2025 Paper 2 Foundation, question 09.6: Name the hydrocarbon represented by the model in Figure 8. [1 mark]

  19. Q05.2

    June 2024 · Paper 2 Higher

    2 marks4.7.1 Carbon compounds as fuels and feedstock4.9.2 Carbon dioxide and methane as greenhouse gases
    The whole paper ↗
    June 2024 Paper 2 Higher, question 05.2: Explain one positive impact on the environment of burning hydrogen rather than natural gas as a fuel. Use Table 2. [2 marks]

  20. Q05.3

    June 2024 · Paper 2 Higher

    2 marks4.7.1 Carbon compounds as fuels and feedstock4.9.3 Common atmospheric pollutants and their sources
    The whole paper ↗
    June 2024 Paper 2 Higher, question 05.3: Explain one negative impact on the environment of burning hydrogen rather than natural gas as a fuel. Use Table 2. [2 marks]
All 77 questions on Carbon compounds as fuels and feedstock, as a list
  1. June 2025, Paper 2 Higher, Q02.1 (1 mark): Name the process represented by Figure 1. [1 mark]
  2. June 2025, Paper 2 Higher, Q02.2 (2 marks): Changes of state take place during the process in Figure 1. Name the change of state taking place in: • the heater • the column. [2 marks] Heater Column
  3. June 2025, Paper 2 Higher, Q02.3 (1 mark): Which fuel is obtained at B in the column? Use Figure 1 and Table 2. [1 mark]
  4. June 2025, Paper 2 Higher, Q02.4 (1 mark): Fuels with higher boiling point ranges contain larger molecules. What is the order of increasing flammability of the fuels? Use Table 2. [1 mark] Tick () one b
  5. June 2025, Paper 2 Higher, Q02.5 (1 mark): Write the molecular formula of the hydrocarbon represented by the model in Figure 2. [1 mark]
  6. June 2025, Paper 2 Higher, Q02.6 (1 mark): Name the hydrocarbon represented by the model in Figure 2. [1 mark]
  7. June 2025, Paper 2 Higher, Q05.1 (1 mark): Table 6 shows the boiling points of some unsaturated hydrocarbons. Table 6 Formula of unsaturated hydrocarbon Boiling point in °C C2H4 – 104 C3H6 – 47 C4H8 X C5
  8. June 2025, Paper 2 Foundation, Q02.2 (1 mark): How many atoms are there in a molecule of C3H6? [1 mark] Tick () one box. 2 3 6 9
  9. June 2025, Paper 2 Foundation, Q02.3 (1 mark): Which is a use of C3H6? [1 mark] Tick () one box. Making a polymer Making ammonia Making glass
  10. June 2025, Paper 2 Foundation, Q02.5 (2 marks): Describe a test for alkenes. Give the result of the test. [2 marks] Test Result
  11. June 2025, Paper 2 Foundation, Q02.6 (1 mark): C10H22 can be cracked to produce C3H6 and an alkane. Complete the equation for the reaction. [1 mark] C10H22 ⟶ C3H6 + C H16
  12. June 2025, Paper 2 Foundation, Q02.7 (1 mark): Complete the sentence. Choose the answer from the box. [1 mark] Smaller alkanes from cracking are useful as . ceramics fertilisers fuels
  13. June 2025, Paper 2 Foundation, Q09.1 (1 mark): Name the process represented by Figure 7. [1 mark]
  14. June 2025, Paper 2 Foundation, Q09.2 (2 marks): Changes of state take place during the process in Figure 7. Name the change of state taking place in: • the heater • the column. [2 marks] Heater Column
  15. June 2025, Paper 2 Foundation, Q09.3 (1 mark): Which fuel is obtained at B in the column? Use Figure 7 and Table 4. [1 mark]
  16. June 2025, Paper 2 Foundation, Q09.4 (1 mark): Fuels with higher boiling point ranges contain larger molecules. What is the order of increasing flammability of the fuels? Use Table 4. [1 mark] Tick () one b
  17. June 2025, Paper 2 Foundation, Q09.5 (1 mark): Write the molecular formula of the hydrocarbon represented by the model in Figure 8. [1 mark]
  18. June 2025, Paper 2 Foundation, Q09.6 (1 mark): Name the hydrocarbon represented by the model in Figure 8. [1 mark]
  19. June 2024, Paper 2 Higher, Q05.2 (2 marks): Explain one positive impact on the environment of burning hydrogen rather than natural gas as a fuel. Use Table 2. [2 marks]
  20. June 2024, Paper 2 Higher, Q05.3 (2 marks): Explain one negative impact on the environment of burning hydrogen rather than natural gas as a fuel. Use Table 2. [2 marks]
  21. June 2024, Paper 2 Higher, Q05.5 (3 marks): Central heating boilers can also burn kerosene. Kerosene is produced from crude oil in a fractionating column using fractional distillation. In the first step,
  22. June 2024, Paper 2 Higher, Q08.2 (2 marks): Describe what will be seen when compound A is shaken with bromine water. [2 marks]
  23. June 2024, Paper 2 Foundation, Q01.1 (2 marks): Name the two elements in a hydrocarbon. [2 marks] 1 2
  24. June 2024, Paper 2 Foundation, Q01.2 (1 mark): How many atoms are there in one molecule of C6H14? [1 mark] Tick () one box. 2 6 14 20 C6H14 is a member of a homologous series.
  25. June 2024, Paper 2 Foundation, Q01.3 (1 mark): What is the general formula for the homologous series that contains C6H14? [1 mark] Tick () one box. CnH2n–2 CnH2n CnH2n+2
  26. June 2024, Paper 2 Foundation, Q01.4 (1 mark): Which homologous series has C6H14 as a member? [1 mark] Tick () one box. Alcohols Alkanes Alkenes Carboxylic acids
  27. June 2024, Paper 2 Foundation, Q01.5 (1 mark): Complete Figure 1 to show the displayed structural formula of C6H14 [1 mark] Figure 1
  28. June 2024, Paper 2 Foundation, Q01.6 (1 mark): Petrol contains C6H14 Petrol is burned in car engines. What general name is used to describe petrol when petrol is burned to release energy? [1 mark]
  29. June 2024, Paper 2 Foundation, Q01.8 (1 mark): A different organic compound (C12H26) can be broken down to produce C6H14 and one other compound. Complete the equation for the reaction. [1 mark] C12H26 → C6H1
  30. June 2024, Paper 2 Foundation, Q01.9 (2 marks): The percentage by mass of each element in C6H14 is: • 84% C • 16% H Complete Figure 2. You should: • label each element on the x-axis • plot the percentage by m
  31. June 2024, Paper 2 Foundation, Q06.1 (1 mark): Complete the sentence. [1 mark] When bromine water is added to ethene, the bromine water changes from orange to . Chlorine reacts with ethene.
  32. June 2023, Paper 2 Foundation, Q02.6 (3 marks): Poly(propene) is produced in three stages: • Stage 1: separating large alkane molecules from crude oil • Stage 2: producing propene molecules from large alkane
  33. June 2022, Paper 2 Higher, Q04.1 (4 marks): Crude oil is separated into fractions by fractional distillation. The fractions obtained from crude oil include: • lubricating oil • naphtha • petroleum gases.
  34. June 2022, Paper 2 Higher, Q04.2 (2 marks): Fractions from crude oil can be processed to produce feedstock for the petrochemical industry. Which two are useful materials produced from this feedstock? [2 m
  35. June 2022, Paper 2 Higher, Q04.5 (2 marks): Table 4 shows information about two more fractions obtained from crude oil. Table 4 Fraction Range of number of carbon atoms in each molecule Kerosene 11–15 Hea
  36. June 2022, Paper 2 Higher, Q04.6 (3 marks): Name the process which produces smaller hydrocarbon molecules from heavy fuel oil. Give the conditions used in this process. [3 marks] Name of process Condition
  37. June 2022, Paper 2 Higher, Q04.7 (1 mark): Hydrocarbon molecules containing seven and eight carbon atoms can be produced when heavy fuel oil is processed. Which pair of hydrocarbon molecules would both t
  38. June 2022, Paper 2 Foundation, Q02.1 (1 mark): Table 2 shows information about three fractions obtained from crude oil. Table 2 Fraction Boiling point range in °C A 200–300 B 100–150 C Below 30 Figure 1 show
  39. June 2022, Paper 2 Foundation, Q02.2 (2 marks): Table 3 shows information about three fractions obtained from crude oil. Table 3 Fraction Range of number of carbon atoms in each molecule Petrol 5–12 Diesel oi
  40. June 2022, Paper 2 Foundation, Q02.3 (2 marks): Complete Figure 2. You should: • complete the y-axis scale • plot the percentage of the heavy fuel oil fraction obtained from source K. Use Table 4. [2 marks] F
  41. June 2022, Paper 2 Foundation, Q02.4 (1 mark): Kerosene is in higher demand than heavy fuel oil. Suggest why crude oil from source J is in higher demand than crude oil from source K. Use Table 4. [1 mark]
  42. June 2022, Paper 2 Foundation, Q02.5 (2 marks): Which two of the following can be used to crack large hydrocarbon molecules? [2 marks] Tick () two boxes. A catalyst A fertiliser Air Ozone Steam
  43. June 2022, Paper 2 Foundation, Q02.6 (1 mark): Alkanes have the general formula CnH2n+2 Complete the formula of the alkane molecule containing 11 carbon atoms. [1 mark] C11H___
  44. June 2022, Paper 2 Foundation, Q02.7 (1 mark): C2H6 is an alkane. Which type of bond is found in a C2H6 molecule? [1 mark] Tick () one box. A double bond between two carbon atoms. A double bond between two
  45. June 2022, Paper 2 Foundation, Q02.8 (2 marks): Which two substances are produced when alkanes completely combust? [2 marks] Tick () two boxes. Carbon Carbon dioxide Carbon monoxide Hydrogen Water
  46. June 2022, Paper 2 Foundation, Q03.7 (1 mark): Crude oil was formed from an ancient biomass as the Earth’s atmosphere evolved. What did this ancient biomass mainly consist of? [1 mark] Tick () one box. Lime
  47. June 2022, Paper 2 Foundation, Q04.7 (1 mark): Table 7 shows the energy content of ethanol and petrol. Table 7 Energy content in MJ (megajoules) per kg Ethanol 30.0 Petrol 46.4 Suggest one disadvantage of us
  48. November 2021, Paper 2 Higher, Q02.1 (2 marks): Plot the data from Table 1 on Figure 2. [2 marks] Figure 2
  49. November 2021, Paper 2 Higher, Q02.2 (1 mark): Predict the boiling point X of the alkane with seven carbon atoms in a molecule. Use Table 1 and Figure 2. [1 mark] X = °C
  50. November 2021, Paper 2 Higher, Q02.3 (1 mark): Figure 2 is not suitable to show the boiling point of the alkane with three carbon atoms in a molecule. Suggest one reason why. [1 mark]
  51. November 2021, Paper 2 Higher, Q02.5 (1 mark): Complete the formula of nonane. [1 mark] C9H___
  52. November 2021, Paper 2 Higher, Q02.6 (2 marks): Nonane will condense lower in a fractionating column during fractional distillation than the other alkanes in Table 1. Explain why. You should refer to the temp
  53. November 2021, Paper 2 Higher, Q06.1 (2 marks): Describe a test for the double carbon-carbon bond in cycloalkene molecules. Give the result of the test. [2 marks] Test Result
  54. November 2021, Paper 2 Higher, Q10.1 (1 mark): Name the process used to produce ethene from large hydrocarbon molecules. [1 mark]
  55. November 2021, Paper 2 Higher, Q10.2 (2 marks): Describe the conditions used to produce ethene from large hydrocarbon molecules. [2 marks]
  56. November 2021, Paper 2 Foundation, Q07.1 (1 mark): Butane is an alkane with small molecules. Complete the sentence. Choose the answer from the box. [1 mark] fertiliser formulation fuel Butane can be used as a .
  57. November 2021, Paper 2 Foundation, Q09.1 (2 marks): Plot the data from Table 6 on Figure 7. [2 marks] Figure 7
  58. November 2021, Paper 2 Foundation, Q09.2 (1 mark): Predict the boiling point X of the alkane with seven carbon atoms in a molecule. Use Table 6 and Figure 7. [1 mark] X = °C
  59. November 2021, Paper 2 Foundation, Q09.3 (1 mark): Figure 7 is not suitable to show the boiling point of the alkane with three carbon atoms in a molecule. Suggest one reason why. [1 mark]
  60. November 2021, Paper 2 Foundation, Q09.5 (1 mark): Complete the formula of nonane. [1 mark] C9H___
  61. November 2021, Paper 2 Foundation, Q09.6 (2 marks): Nonane will condense lower in a fractionating column during fractional distillation than the other alkanes in Table 6. Explain why. You should refer to the temp
  62. November 2020, Paper 2 Higher, Q03.1 (2 marks): Draw one line from each hydrocarbon to the formula of that hydrocarbon. [2 marks] Hydrocarbon Formula Hexane Hexene C6H8 C6H10 C6H12 C6H14 C6H16
  63. November 2020, Paper 2 Higher, Q03.2 (2 marks): Bromine water is added to hexane and to hexene. What would be observed when bromine water is added to hexane and to hexene? [2 marks] Hexane Hexene
  64. November 2020, Paper 2 Higher, Q03.3 (6 marks): Ethane is an alkane and ethene is an alkene. Figure 1 shows the displayed structural formulae of ethane and of ethene. Figure 1 Compare ethane with ethene. You
  65. November 2020, Paper 2 Foundation, Q06.4 (2 marks): The alkene needed to make poly(propene) is produced from crude oil. Which two processes are used to produce this alkene from crude oil? [2 marks] Tick () two b
  66. November 2020, Paper 2 Foundation, Q10.1 (2 marks): Draw one line from each hydrocarbon to the formula of that hydrocarbon. [2 marks] Hydrocarbon Formula Hexane Hexene C6H8 C6H10 C6H12 C6H14 C6H16
  67. November 2020, Paper 2 Foundation, Q10.2 (2 marks): Bromine water is added to hexane and to hexene. What would be observed when bromine water is added to hexane and to hexene? [2 marks] Hexane Hexene
  68. November 2020, Paper 2 Foundation, Q10.3 (6 marks): Ethane is an alkane and ethene is an alkene. Figure 8 shows the displayed structural formulae of ethane and of ethene. Figure 8 Compare ethane with ethene. You
  69. Specimen, Paper 2 Higher, Q01.1 (1 mark): Which product of the reaction shown is an alkane? [1 mark Tick one box. C2H4 C3H6 C4H8 C6H14
  70. Specimen, Paper 2 Higher, Q01.2 (1 mark): Table 1 shows the boiling point, flammability and viscosity of C18H38 compared with the other hydrocarbons shown in the equation. Table 1 Boiling point Flammabi
  71. Specimen, Paper 2 Higher, Q04.2 (6 marks): Evaluate the production and use of bottles made from soda-lime glass and those made from HD poly(ethene). Use the information given and your knowledge and under
  72. Specimen, Paper 2 Foundation, Q08.1 (1 mark): The names and formulae of three hydrocarbons in the same homologous series are: Ethane C2H6 Propane C3H8 Butane C4H10 The next member in the series is pentane.
  73. Specimen, Paper 2 Foundation, Q08.2: Which homologous series contains ethane, propane and butane? [1 mar Tick one box. Alcohols Alkanes Alkenes Carboxylic acids
  74. Specimen, Paper 2 Foundation, Q08.3 (2 marks): Propane (C3H8) is used as a fuel. Complete the equation for the complete combustion of propane. [2 mark C3H8 + 5O2 → 3 + 4
  75. Specimen, Paper 2 Foundation, Q08.4 (2 marks): Octane (C8H18) is a hydrocarbon found in petrol. Explain why octane is a hydrocarbon. [2 marks
  76. Specimen, Paper 2 Foundation, Q08.5 (3 marks): Table 3 gives information about the pollutants produced by cars using diesel or petrol as a fuel. Table 3 Fuel Relative amounts of pollutants Oxides of Nitrogen
  77. Specimen, Paper 2 Foundation, Q12.2 (6 marks): Table 8 gives information about milk bottles. Table 8 Glass milk bottle Plastic milk bottle Raw materials Sand, limestone, salt Crude oil Bottle material Soda-l

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