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Inorganic chemistry and the periodic table: OCR A‑Level Chemistry B questions

Every OCR A-Level Chemistry B exam question on DF Inorganic chemistry and the periodic table (specification points DF(k)), 2016–2025, with its mark scheme and examiner’s report.

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2,049 questions

  1. Q16

    June 2025 · Paper 1

    1 markDF Inorganic chemistry and the periodic table
    The whole paper ↗
    June 2025 Paper 1, question 16: Modern petrol cars have catalytic converters. Which row shows a pollutant removed by these catalytic converters and the environmental problem the pollutant caus

  2. Q8

    June 2025 · AS Paper 1

    1 markDF Inorganic chemistry and the periodic table
    The whole paper ↗
    June 2025 AS Paper 1, question 8: What is correct about the emissions from petrol-fuelled cars? A CO comes from the complete combustion of petrol. B NOx is mainly made by the combustion of nitro

  3. Q1(a)(ii)

    June 2025 · AS Paper 2

    1 markDF Inorganic chemistry and the periodic table
    The whole paper ↗
    June 2025 AS Paper 2, question 1(a)(ii): Why is carbon monoxide hazardous? [1]

  4. Q1(a)(iii)

    June 2025 · AS Paper 2

    1 markDF Inorganic chemistry and the periodic table
    The whole paper ↗
    June 2025 AS Paper 2, question 1(a)(iii): Write an equation for the reaction of carbon monoxide with nitrogen monoxide to give less hazardous products. [1]

  5. Q3(c)

    June 2024 · AS Paper 2

    1 markDF Inorganic chemistry and the periodic table
    The whole paper ↗
    June 2024 AS Paper 2, question 3(c): Biodiesel produces lower emissions of carbon monoxide and carbon. It also produces less of other pollutants, such as sulfur dioxide, compared with diesel. How i

  6. Q1(b)(i)

    June 2023 · Paper 3

    2 marksDF Inorganic chemistry and the periodic table
    The whole paper ↗
    June 2023 Paper 3, question 1(b)(i): The bar chart below shows the reduction in the various pollutant levels when a suitable catalytic converter is fitted. Calculate the percentage reduction in NOx

  7. Q1(b)(ii)

    June 2023 · Paper 3

    3 marksDF Inorganic chemistry and the periodic table
    The whole paper ↗
    June 2023 Paper 3, question 1(b)(ii): A student says that the reactions in a catalytic converter decrease car pollution to zero. Comment on this statement. [3]

  8. Q23(e)

    June 2023 · AS Paper 1

    1 markDF Inorganic chemistry and the periodic table
    The whole paper ↗
    June 2023 AS Paper 1, question 23(e): Cyanogen is toxic. Name another toxic compound in Equation 23.1. [1]

  9. Q4(a)(ii)

    June 2022 · AS Paper 2

    1 markDF Inorganic chemistry and the periodic table
    The whole paper ↗
    June 2022 AS Paper 2, question 4(a)(ii): Oxides of nitrogen (NOx) which can lead to acid rain are also produced in a petrol engine. Give the conditions in the engine that cause the usually unreactive n

  10. Q5

    November 2021 · Paper 1

    1 markDF Inorganic chemistry and the periodic table
    The whole paper ↗
    November 2021 Paper 1, question 5: What is correct about the polluting gases formed by a petrol engine? A CO is formed by incomplete combustion of hydrocarbons and is toxic. B CO2 is formed by co

  11. Q24(a)(i)

    November 2021 · AS Paper 1

    2 marksDF Inorganic chemistry and the periodic table
    The whole paper ↗
    November 2021 AS Paper 1, question 24(a)(i): Apart from giving more power, give one other advantage of adding butan-1-ol to diesel and explain why this is important. [2]

  12. Q24(a)(ii)

    November 2021 · AS Paper 1

    2 marksDF Inorganic chemistry and the periodic table
    The whole paper ↗
    November 2021 AS Paper 1, question 24(a)(ii): Explain how NOx is formed in a vehicle engine. [2]

  13. Q6

    November 2020 · Paper 1

    1 markDF Inorganic chemistry and the periodic table
    The whole paper ↗
    November 2020 Paper 1, question 6: Which row shows the correct pollutants produced when burning the fuel? Sulfur Carbon Oxides of Fuel Particulates dioxide monoxide nitrogen A Biodiesel 7 3 3 7 B

  14. Q31(c)(ii)

    November 2020 · Paper 1

    1 markDF Inorganic chemistry and the periodic table
    The whole paper ↗
    November 2020 Paper 1, question 31(c)(ii): Write an equation for the formation of NO in the engine. [1]

  15. Q33(e)(i)

    June 2019 · Paper 1

    2 marksDF Inorganic chemistry and the periodic table
    The whole paper ↗
    June 2019 Paper 1, question 33(e)(i): Explain how nitrogen monoxide forms in a car engine. [2]

  16. Q4

    June 2018 · Paper 1

    1 markDF Inorganic chemistry and the periodic table
    The whole paper ↗
    June 2018 Paper 1, question 4: Which statement about NOx pollution is correct? A It is only produced in petrol engines. B It can cause acid rain. C It is not removed at all by catalytic conve

  17. Q24(a)

    June 2018 · AS Paper 1

    1 markDF Inorganic chemistry and the periodic table
    The whole paper ↗
    June 2018 AS Paper 1, question 24(a): Name the main polluting effect of NO2 in the atmosphere. [1]

  18. Q5

    June 2017 · Paper 1

    1 markDF Inorganic chemistry and the periodic table
    The whole paper ↗
    June 2017 Paper 1, question 5: An engine runs on ethanol. What would not be found in the exhaust from this engine? A SO2 B CO2 C NO D CO Your answer [1]

  19. Q23(d)

    June 2017 · AS Paper 1

    1 markDF Inorganic chemistry and the periodic table
    The whole paper ↗
    June 2017 AS Paper 1, question 23(d): Both the fuels would produce NO if used in a car engine. Explain how NO is produced in a car engine. [1]
All 19 questions on Inorganic chemistry and the periodic table, as a list
  1. June 2025, Paper 1, Q16 (1 mark): Modern petrol cars have catalytic converters. Which row shows a pollutant removed by these catalytic converters and the environmental problem the pollutant caus
  2. June 2025, AS Paper 1, Q8 (1 mark): What is correct about the emissions from petrol-fuelled cars? A CO comes from the complete combustion of petrol. B NOx is mainly made by the combustion of nitro
  3. June 2025, AS Paper 2, Q1(a)(ii) (1 mark): Why is carbon monoxide hazardous? [1]
  4. June 2025, AS Paper 2, Q1(a)(iii) (1 mark): Write an equation for the reaction of carbon monoxide with nitrogen monoxide to give less hazardous products. [1]
  5. June 2024, AS Paper 2, Q3(c) (1 mark): Biodiesel produces lower emissions of carbon monoxide and carbon. It also produces less of other pollutants, such as sulfur dioxide, compared with diesel. How i
  6. June 2023, Paper 3, Q1(b)(i) (2 marks): The bar chart below shows the reduction in the various pollutant levels when a suitable catalytic converter is fitted. Calculate the percentage reduction in NOx
  7. June 2023, Paper 3, Q1(b)(ii) (3 marks): A student says that the reactions in a catalytic converter decrease car pollution to zero. Comment on this statement. [3]
  8. June 2023, AS Paper 1, Q23(e) (1 mark): Cyanogen is toxic. Name another toxic compound in Equation 23.1. [1]
  9. June 2022, AS Paper 2, Q4(a)(ii) (1 mark): Oxides of nitrogen (NOx) which can lead to acid rain are also produced in a petrol engine. Give the conditions in the engine that cause the usually unreactive n
  10. November 2021, Paper 1, Q5 (1 mark): What is correct about the polluting gases formed by a petrol engine? A CO is formed by incomplete combustion of hydrocarbons and is toxic. B CO2 is formed by co
  11. November 2021, AS Paper 1, Q24(a)(i) (2 marks): Apart from giving more power, give one other advantage of adding butan-1-ol to diesel and explain why this is important. [2]
  12. November 2021, AS Paper 1, Q24(a)(ii) (2 marks): Explain how NOx is formed in a vehicle engine. [2]
  13. November 2020, Paper 1, Q6 (1 mark): Which row shows the correct pollutants produced when burning the fuel? Sulfur Carbon Oxides of Fuel Particulates dioxide monoxide nitrogen A Biodiesel 7 3 3 7 B
  14. November 2020, Paper 1, Q31(c)(ii) (1 mark): Write an equation for the formation of NO in the engine. [1]
  15. June 2019, Paper 1, Q33(e)(i) (2 marks): Explain how nitrogen monoxide forms in a car engine. [2]
  16. June 2018, Paper 1, Q4 (1 mark): Which statement about NOx pollution is correct? A It is only produced in petrol engines. B It can cause acid rain. C It is not removed at all by catalytic conve
  17. June 2018, AS Paper 1, Q24(a) (1 mark): Name the main polluting effect of NO2 in the atmosphere. [1]
  18. June 2017, Paper 1, Q5 (1 mark): An engine runs on ethanol. What would not be found in the exhaust from this engine? A SO2 B CO2 C NO D CO Your answer [1]
  19. June 2017, AS Paper 1, Q23(d) (1 mark): Both the fuels would produce NO if used in a car engine. Explain how NO is produced in a car engine. [1]

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