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Colour of complexes: CAIE A‑Level Chemistry questions

Every CAIE A-Level Chemistry exam question on 28.3 Colour of complexes, June 2024 and the specimen papers, with its mark scheme and examiner’s report.

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312 questions

  1. Q2(b)(i)

    June 2024 · Paper 4

    1 mark28.3 Colour of complexes
    The whole paper ↗
    June 2024 Paper 4, question 2(b)(i): Define degenerate d orbitals. [1]

  2. Q3(c)

    June 2024 · Paper 4

    3 marks28.3 Colour of complexes
    The whole paper ↗
    June 2024 Paper 4, question 3(c): Potassium iron(III) ethanedioate, K3[Fe(C2O4)3], dissolves in water to form a green solution. Explain why transition elements can form coloured complexes. [3]

  3. Q6(c)(ii)

    Specimen · Paper 4

    4 marks28.3 Colour of complexes
    The whole paper ↗
    Specimen Paper 4, question 6(c)(ii): Explain why these two complex ions are coloured and why they have different colours. [4]
All 3 questions on Colour of complexes, as a list
  1. June 2024, Paper 4, Q2(b)(i) (1 mark): Define degenerate d orbitals. [1]
  2. June 2024, Paper 4, Q3(c) (3 marks): Potassium iron(III) ethanedioate, K3[Fe(C2O4)3], dissolves in water to form a green solution. Explain why transition elements can form coloured complexes. [3]
  3. Specimen, Paper 4, Q6(c)(ii) (4 marks): Explain why these two complex ions are coloured and why they have different colours. [4]

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