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Chemistry of the d-block transition metals: Eduqas A‑Level Chemistry questions

Every Eduqas A-Level Chemistry exam question on PI2.2 Chemistry of the d-block transition metals, 2016–2025, with its mark scheme and examiner’s report.

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1,513 questions

  1. Q12(b)(i)

    June 2025 · Component 1

    2 marksPI2.2 Chemistry of the d-block transition metals
    The whole paper ↗
    June 2025 Component 1, question 12(b)(i): State and explain the colour change that occurs when aqueous iron(II) sulfate is added to acidified potassium dichromate solution. [2]

  2. Q12(b)(ii)

    June 2025 · Component 1

    2 marksPI2.2 Chemistry of the d-block transition metals
    The whole paper ↗
    June 2025 Component 1, question 12(b)(ii): State and explain the colour change that occurs when excess aqueous sodium hydroxide is added to acidified potassium dichromate solution. [2]

  3. Q12(c)(i)

    June 2025 · Component 1

    3 marksPI2.2 Chemistry of the d-block transition metals
    The whole paper ↗
    June 2025 Component 1, question 12(c)(i): Explain why the solution is pale blue. [3]

  4. Q12(c)(ii)

    June 2025 · Component 1

    1 markPI2.2 Chemistry of the d-block transition metals
    The whole paper ↗
    June 2025 Component 1, question 12(c)(ii): Addition of concentrated hydrochloric acid causes the solution to turn green. Draw the structure of the copper-containing ion present in the solution. [1]

  5. Q12(d)(i)

    June 2025 · Component 1

    1 markPI2.2 Chemistry of the d-block transition metals
    The whole paper ↗
    June 2025 Component 1, question 12(d)(i): Suggest why the reaction must be performed in the absence of air. [1]

  6. Q9(b)(i)

    June 2024 · Component 1

    1 markPI2.2 Chemistry of the d-block transition metals
    The whole paper ↗
    June 2024 Component 1, question 9(b)(i): Draw the structure of a [Co(H2O)6]2+ ion. [1]

  7. Q9(b)(ii)

    June 2024 · Component 1

    1 markPI2.2 Chemistry of the d-block transition metals
    The whole paper ↗
    June 2024 Component 1, question 9(b)(ii): State the colour of the [Co(H2O)6]2+ ion. [1]

  8. Q12(e)(ii)

    June 2024 · Component 1

    2 marksPI2.2 Chemistry of the d-block transition metals
    The whole paper ↗
    June 2024 Component 1, question 12(e)(ii): Suggest a chemical test that could be used to confirm the oxidation state of the iron in chukanovite. [2]

  9. Q14(c)(ii)

    June 2024 · Component 1

    2 marksPI2.2 Chemistry of the d-block transition metals
    The whole paper ↗
    June 2024 Component 1, question 14(c)(ii): State what is observed when aqueous copper(II) sulfate is added to solution J. Give an ionic equation for the reaction. [2]

  10. Q5

    June 2024 · Component 3

    12 marksPI2.2 Chemistry of the d-block transition metalsC1.3 Chemical calculations
    The whole paper ↗
    June 2024 Component 3, question 5: Tutton’s salts are a family of double salts with the formula AwBx(SO4)y.z(H2O). They contain two different cations, Aa+ and Bb+. The following tests were carrie

  11. Q11(b)

    Autumn 2021 · Component 1

    1 markPI2.2 Chemistry of the d-block transition metals
    The whole paper ↗
    Autumn 2021 Component 1, question 11(b): Copper(I) compounds are generally white solids. Explain why copper(I) compounds are not coloured. [1]

  12. Q11(c)(i)

    Autumn 2021 · Component 1

    1 markPI2.2 Chemistry of the d-block transition metals
    The whole paper ↗
    Autumn 2021 Component 1, question 11(c)(i): Copper(II) oxide reacts with concentrated hydrochloric acid to give a green solution. Draw the structure of the copper-containing ion present in this solution.

  13. Q11(c)(ii)

    Autumn 2021 · Component 1

    2 marksPI2.2 Chemistry of the d-block transition metals
    The whole paper ↗
    Autumn 2021 Component 1, question 11(c)(ii): Copper(II) oxide reacts with dilute sulfuric acid to give a solution containing aqueous Cu2+ ions. Aqueous Cu2+ ions are blue, but a white solid is formed when

  14. Q4(a)

    Autumn 2020 · Component 1

    1 markPI2.2 Chemistry of the d-block transition metals
    The whole paper ↗
    Autumn 2020 Component 1, question 4(a): Give the formula of the white solid. [1]

  15. Q10(a)

    Autumn 2020 · Component 1

    1 markPI2.2 Chemistry of the d-block transition metals
    The whole paper ↗
    Autumn 2020 Component 1, question 10(a): Give a reason why zinc is not considered to be a transition element. [1]

  16. Q10(b)

    Autumn 2020 · Component 1

    1 markPI2.2 Chemistry of the d-block transition metals
    The whole paper ↗
    Autumn 2020 Component 1, question 10(b): Transition elements are able to form complex ions and these ions are usually coloured. Give the colour of the [Co(H2O)6]2+ ion. [1] …………… ……………..

  17. Q10(c)(i)

    Autumn 2020 · Component 1

    1 markPI2.2 Chemistry of the d-block transition metals
    The whole paper ↗
    Autumn 2020 Component 1, question 10(c)(i): Identify the pale blue precipitate. [1]

  18. Q10(c)(ii)

    Autumn 2020 · Component 1

    6 marksPI2.2 Chemistry of the d-block transition metalsC2.1 Simple equilibria and acid-base reactions
    The whole paper ↗
    Autumn 2020 Component 1, question 10(c)(ii): Some of the colour changes observed when other solutions are added to solution A are given in the following scheme. add dilute add concentrated hydrochloric aci

  19. Q10(d)

    Autumn 2020 · Component 1

    2 marksPI2.2 Chemistry of the d-block transition metals
    The whole paper ↗
    Autumn 2020 Component 1, question 10(d): Give another typical property of transition elements and use it to show that copper is a typical transition element but zinc is not. [2]

  20. Q6

    June 2019 · Component 1

    2 marksPI2.2 Chemistry of the d-block transition metals
    The whole paper ↗
    June 2019 Component 1, question 6: When blue crystals of CuSO4.5H2O are heated they form a white solid. Upon addition of water they return to their original blue colour. Explain these observation
All 28 questions on Chemistry of the d-block transition metals, as a list
  1. June 2025, Component 1, Q12(b)(i) (2 marks): State and explain the colour change that occurs when aqueous iron(II) sulfate is added to acidified potassium dichromate solution. [2]
  2. June 2025, Component 1, Q12(b)(ii) (2 marks): State and explain the colour change that occurs when excess aqueous sodium hydroxide is added to acidified potassium dichromate solution. [2]
  3. June 2025, Component 1, Q12(c)(i) (3 marks): Explain why the solution is pale blue. [3]
  4. June 2025, Component 1, Q12(c)(ii) (1 mark): Addition of concentrated hydrochloric acid causes the solution to turn green. Draw the structure of the copper-containing ion present in the solution. [1]
  5. June 2025, Component 1, Q12(d)(i) (1 mark): Suggest why the reaction must be performed in the absence of air. [1]
  6. June 2024, Component 1, Q9(b)(i) (1 mark): Draw the structure of a [Co(H2O)6]2+ ion. [1]
  7. June 2024, Component 1, Q9(b)(ii) (1 mark): State the colour of the [Co(H2O)6]2+ ion. [1]
  8. June 2024, Component 1, Q12(e)(ii) (2 marks): Suggest a chemical test that could be used to confirm the oxidation state of the iron in chukanovite. [2]
  9. June 2024, Component 1, Q14(c)(ii) (2 marks): State what is observed when aqueous copper(II) sulfate is added to solution J. Give an ionic equation for the reaction. [2]
  10. June 2024, Component 3, Q5 (12 marks): Tutton’s salts are a family of double salts with the formula AwBx(SO4)y.z(H2O). They contain two different cations, Aa+ and Bb+. The following tests were carrie
  11. Autumn 2021, Component 1, Q11(b) (1 mark): Copper(I) compounds are generally white solids. Explain why copper(I) compounds are not coloured. [1]
  12. Autumn 2021, Component 1, Q11(c)(i) (1 mark): Copper(II) oxide reacts with concentrated hydrochloric acid to give a green solution. Draw the structure of the copper-containing ion present in this solution.
  13. Autumn 2021, Component 1, Q11(c)(ii) (2 marks): Copper(II) oxide reacts with dilute sulfuric acid to give a solution containing aqueous Cu2+ ions. Aqueous Cu2+ ions are blue, but a white solid is formed when
  14. Autumn 2020, Component 1, Q4(a) (1 mark): Give the formula of the white solid. [1]
  15. Autumn 2020, Component 1, Q10(a) (1 mark): Give a reason why zinc is not considered to be a transition element. [1]
  16. Autumn 2020, Component 1, Q10(b) (1 mark): Transition elements are able to form complex ions and these ions are usually coloured. Give the colour of the [Co(H2O)6]2+ ion. [1] …………… ……………..
  17. Autumn 2020, Component 1, Q10(c)(i) (1 mark): Identify the pale blue precipitate. [1]
  18. Autumn 2020, Component 1, Q10(c)(ii) (6 marks): Some of the colour changes observed when other solutions are added to solution A are given in the following scheme. add dilute add concentrated hydrochloric aci
  19. Autumn 2020, Component 1, Q10(d) (2 marks): Give another typical property of transition elements and use it to show that copper is a typical transition element but zinc is not. [2]
  20. June 2019, Component 1, Q6 (2 marks): When blue crystals of CuSO4.5H2O are heated they form a white solid. Upon addition of water they return to their original blue colour. Explain these observation
  21. June 2019, Component 1, Q10(d)(i) (1 mark): Give the formula of the ion identified from this observation. [1]
  22. June 2019, Component 3, Q3(a)(ii) (3 marks): Describe a chemical test to show that the solution contains iron(II) ions. [3] Reagent(s) ……… Observation(s) …… Ionic equation ……
  23. June 2018, Component 1, Q10(b)(i) (1 mark): Give the formula of the complex ion present in dilute aqueous solutions of copper(II) compounds. [1]
  24. June 2018, Component 1, Q10(b)(ii) (2 marks): Explain why copper(I) compounds are not coloured. [2]
  25. June 2018, Component 1, Q10(b)(iii) (4 marks): State the colour change that occurs when concentrated ammonia solution is added to copper(II) compounds in aqueous solution, drawing the structure of the copper
  26. June 2018, Component 3, Q1 (6 marks): Outline two simple reactions, including relevant observations, formulae and equations, to show that complexes of copper(II) ions can undergo ligand exchange. Yo
  27. June 2017, Component 1, Q3 (2 marks): When excess ammonia solution is added to aqueous copper(II) sulfate a colour change occurs. Give the colour of the solution formed and draw the complex ion that
  28. June 2017, Component 1, Q10(c)(i) (3 marks): I. Explain why both catalyst mixtures are classified as heterogeneous catalysts. [1] II. The active components of the catalyst mixtures are CuO and Fe2O3. Expla

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