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Chemistry of the p-block: Eduqas A‑Level Chemistry questions

Every Eduqas A-Level Chemistry exam question on PI2.1 Chemistry of the p-block, 2016–2025, with its mark scheme and examiner’s report.

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1,513 questions

  1. Q5(a)

    June 2025 · Component 1

    1 markPI2.1 Chemistry of the p-block
    The whole paper ↗
    June 2025 Component 1, question 5(a): Write an equation for a reaction that shows that carbon dioxide is an acidic oxide. [1]

  2. Q5(b)

    June 2025 · Component 1

    1 markPI2.1 Chemistry of the p-block
    The whole paper ↗
    June 2025 Component 1, question 5(b): State what is meant by the term amphoteric. [1]

  3. Q10(c)(ii)

    June 2025 · Component 1

    1 markPI2.1 Chemistry of the p-block
    The whole paper ↗
    June 2025 Component 1, question 10(c)(ii): State why lead is the only Group 4 element that is most stable in the +2 oxidation state in its compounds. [1]

  4. Q3

    June 2024 · Component 1

    2 marksPI2.1 Chemistry of the p-block
    The whole paper ↗
    June 2024 Component 1, question 3: Nitrogen and phosphorus can both form chlorides of formula XCl3 but only phosphorus can form a chloride of formula XCl5. Explain why PCl5 exists but NCl5 does n

  5. Q10(c)(i)

    June 2024 · Component 1

    3 marksPI2.1 Chemistry of the p-block
    The whole paper ↗
    June 2024 Component 1, question 10(c)(i): Aluminium hydroxide is an amphoteric compound. Describe reactions that would show this amphoteric behaviour, including all relevant equations. [3]

  6. Q10(c)(ii)

    June 2024 · Component 1

    3 marksPI2.1 Chemistry of the p-block
    The whole paper ↗
    June 2024 Component 1, question 10(c)(ii): Explain why aluminium chloride molecules, AlCl3, form dimers of formula Al2Cl6. You may include a diagram as part of your answer. [3]

  7. Q14(c)(i)

    June 2024 · Component 1

    2 marksC1.6 The Periodic TablePI2.1 Chemistry of the p-block
    The whole paper ↗
    June 2024 Component 1, question 14(c)(i): State what is observed when aqueous lead(II) nitrate is added to solution J. Give an ionic equation for the reaction. [2]

  8. Q8(b)

    Autumn 2021 · Component 1

    1 markPI2.1 Chemistry of the p-block
    The whole paper ↗
    Autumn 2021 Component 1, question 8(b): Sulfur is able to form a range of fluorides including SF2 and SF6 but oxygen can only form fluorides containing two fluorine atoms. Give a reason for this diffe

  9. Q3

    Autumn 2021 · Component 3

    6 marksPI2.1 Chemistry of the p-blockC1.6 The Periodic Table
    The whole paper ↗
    Autumn 2021 Component 3, question 3: A student is asked to identify the contents of six test tubes containing aqueous solutions of the following six inorganic compounds. barium nitrate potassium io

  10. Q5(f)(i)

    Autumn 2021 · Component 3

    1 markPI2.1 Chemistry of the p-block
    The whole paper ↗
    Autumn 2021 Component 3, question 5(f)(i): mean volume of sodium thiosulfate used was 21.95 cm3. (f) The thermal decomposition of lead(IV) oxide at 600 °C produces lead(II) oxide and oxygen. (i) Give the

  11. Q12(c)(ii)

    Autumn 2020 · Component 1

    2 marksPI2.1 Chemistry of the p-block
    The whole paper ↗
    Autumn 2020 Component 1, question 12(c)(ii): Explain why carbon monoxide is a reducing agent whilst the corresponding oxide of lead, PbO, is not. [2]

  12. Q12(e)(ii)

    June 2019 · Component 1

    2 marksPI2.1 Chemistry of the p-block
    The whole paper ↗
    June 2019 Component 1, question 12(e)(ii): Explain why the molecule AlCl3 often forms dimers. [2]

  13. Q11(b)(iv)

    June 2018 · Component 1

    4 marksC1.6 The Periodic TablePI2.1 Chemistry of the p-block
    The whole paper ↗
    June 2018 Component 1, question 11(b)(iv): As time was short the teacher suggested the following simplified method. • Look at the colour of the sample • Carry out a flame test to identify s-block cations

  14. Q3

    June 2018 · Component 3

    10 marksC1.6 The Periodic TablePI2.1 Chemistry of the p-block
    The whole paper ↗
    June 2018 Component 3, question 3: A student was asked to identify four inorganic salts, labelled P, Q, R and S, by their reaction with aqueous sodium hydroxide and by the interactions between th

  15. Q11(d)(i)

    June 2017 · Component 1

    2 marksPI2.1 Chemistry of the p-block
    The whole paper ↗
    June 2017 Component 1, question 11(d)(i): Explain why phosphorus can form two chlorides (PCl3 and PCl5) but nitrogen can only form one chloride (NCl3). [2]

  16. Q11(d)(iii)

    June 2017 · Component 1

    2 marksPI2.1 Chemistry of the p-block
    The whole paper ↗
    June 2017 Component 1, question 11(d)(iii): Explain why silicon can form only one chloride (SiCl4) but lead can form two chlorides (PbCl2 and PbCl4). [2]
All 16 questions on Chemistry of the p-block, as a list
  1. June 2025, Component 1, Q5(a) (1 mark): Write an equation for a reaction that shows that carbon dioxide is an acidic oxide. [1]
  2. June 2025, Component 1, Q5(b) (1 mark): State what is meant by the term amphoteric. [1]
  3. June 2025, Component 1, Q10(c)(ii) (1 mark): State why lead is the only Group 4 element that is most stable in the +2 oxidation state in its compounds. [1]
  4. June 2024, Component 1, Q3 (2 marks): Nitrogen and phosphorus can both form chlorides of formula XCl3 but only phosphorus can form a chloride of formula XCl5. Explain why PCl5 exists but NCl5 does n
  5. June 2024, Component 1, Q10(c)(i) (3 marks): Aluminium hydroxide is an amphoteric compound. Describe reactions that would show this amphoteric behaviour, including all relevant equations. [3]
  6. June 2024, Component 1, Q10(c)(ii) (3 marks): Explain why aluminium chloride molecules, AlCl3, form dimers of formula Al2Cl6. You may include a diagram as part of your answer. [3]
  7. June 2024, Component 1, Q14(c)(i) (2 marks): State what is observed when aqueous lead(II) nitrate is added to solution J. Give an ionic equation for the reaction. [2]
  8. Autumn 2021, Component 1, Q8(b) (1 mark): Sulfur is able to form a range of fluorides including SF2 and SF6 but oxygen can only form fluorides containing two fluorine atoms. Give a reason for this diffe
  9. Autumn 2021, Component 3, Q3 (6 marks): A student is asked to identify the contents of six test tubes containing aqueous solutions of the following six inorganic compounds. barium nitrate potassium io
  10. Autumn 2021, Component 3, Q5(f)(i) (1 mark): mean volume of sodium thiosulfate used was 21.95 cm3. (f) The thermal decomposition of lead(IV) oxide at 600 °C produces lead(II) oxide and oxygen. (i) Give the
  11. Autumn 2020, Component 1, Q12(c)(ii) (2 marks): Explain why carbon monoxide is a reducing agent whilst the corresponding oxide of lead, PbO, is not. [2]
  12. June 2019, Component 1, Q12(e)(ii) (2 marks): Explain why the molecule AlCl3 often forms dimers. [2]
  13. June 2018, Component 1, Q11(b)(iv) (4 marks): As time was short the teacher suggested the following simplified method. • Look at the colour of the sample • Carry out a flame test to identify s-block cations
  14. June 2018, Component 3, Q3 (10 marks): A student was asked to identify four inorganic salts, labelled P, Q, R and S, by their reaction with aqueous sodium hydroxide and by the interactions between th
  15. June 2017, Component 1, Q11(d)(i) (2 marks): Explain why phosphorus can form two chlorides (PCl3 and PCl5) but nitrogen can only form one chloride (NCl3). [2]
  16. June 2017, Component 1, Q11(d)(iii) (2 marks): Explain why silicon can form only one chloride (SiCl4) but lead can form two chlorides (PbCl2 and PbCl4). [2]

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