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Group 2 oxides, hydroxides and uses: OCR A‑Level Chemistry A questions

OCR A-Level Chemistry A past-paper questions on 3.1.2.2 Group 2 oxides, hydroxides and uses, 2016–2025, with mark schemes and examiner’s reports where available.

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  1. Q4

    June 2024 · Paper 1

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  2. The start of question 21

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  3. Q7

    June 2024 · AS Paper 1

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  4. Q2(b)(i)

    June 2022 · AS Paper 2

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  5. Q4

    November 2020 · AS Paper 1

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  6. The start of question 23

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  7. Q9

    June 2019 · Paper 1

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  8. Q16(c)(i)

    June 2019 · Paper 1

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  9. Q16(c)(ii)

    June 2019 · Paper 1

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  10. The start of question 1

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All 10 questions on Group 2 oxides, hydroxides and uses, as a list
  1. June 2024, Paper 1, Q4 (1 mark): Which compounds of magnesium can be used as ‘antacids’? A Chlorides B Hydroxides C Nitrates D Sulfates Your answer [1]
  2. June 2024, Paper 1, Q21(a) (3 marks): The flowchart shows some reactions of barium and its compounds. Barium Reaction 1 Barium oxide Reaction 2 Barium hydroxide Reaction 3 Barium chloride • Write ba
  3. June 2024, AS Paper 1, Q7 (1 mark): Group 2 compounds can be used in agriculture to neutralise acid soils and in medicine to treat indigestion. Which Group 2 compound is not suitable for either us
  4. June 2022, AS Paper 2, Q2(b)(i) (1 mark): Predict the approximate pH of the colourless solution. pH = [1]
  5. November 2020, AS Paper 1, Q4 (1 mark): Some Group 2 compounds can be used to neutralise acid soils and to treat acid indigestion. Which Group 2 compound would not be suitable for either use? A BaSO4
  6. November 2020, AS Paper 1, Q23(c) (4 marks): A student plans to prepare a solution of Ba(OH)2 from barium by two different reaction routes. Outline 2 reaction routes for preparing a solution of Ba(OH)2 fro
  7. June 2019, Paper 1, Q9 (1 mark): Which statement is not correct for Group 2 hydroxides? A Mg(OH)2 can be used to treat indigestion. B Ca(OH)2 is used in agriculture to neutralise alkaline soils
  8. June 2019, Paper 1, Q16(c)(i) (1 mark): Write the equation for the reaction of calcium oxide with water. State symbols are not required. [1]
  9. June 2019, Paper 1, Q16(c)(ii) (1 mark): Suggest the approximate pH of the two solutions formed in the test tubes. pH with calcium oxide pH with strontium oxide [1]
  10. June 2017, AS Paper 2, Q1(c)(ii) (4 marks): Solid barium nitride is reacted with water, forming an alkaline solution A and an alkaline gas B. Identify A and B. Write an equation, including state symbols,

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