plumiReactivity of Group 2 metals: OCR A‑Level Chemistry A questions
OCR A-Level Chemistry A past-paper questions on 3.1.2.1 Reactivity of Group 2 metals, 2016–2025, with mark schemes and examiner’s reports where available.
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All 21 questions on Reactivity of Group 2 metals, as a list
- June 2025, Paper 1, Q14 (1 mark): Barium is in Group 2 of the periodic table. Which statement(s) about barium is / are correct? 1 Its outer shell electrons are in an s-orbital. 2 It reacts more
- June 2025, AS Paper 2, Q2(a)(ii) (6 marks): This question is about reactions of some Group 2 elements and their compounds. (ii)* Magnesium and calcium differ in their reactivity. Give a balanced equation
- 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
- June 2024, AS Paper 2, Q2(a)(iv) (1 mark): Magnesium reacts with oxygen in the air. Write the equation for this reaction. [1]
- June 2023, Paper 1, Q20(b) (5 marks): A student reacts strontium metal with water to make a 250.0 cm3 solution of aqueous strontium hydroxide, Sr(OH)2. The solution contains 0.145 g of strontium hyd
- June 2023, AS Paper 2, Q2(a)(i) (2 marks): Construct the equation for the reaction and predict one observation that the student would make. Equation Observation [2]
- June 2023, AS Paper 2, Q2(a)(ii) (1 mark): Suggest one difference that the student would observe in the reaction of barium with water compared to the reaction of calcium with water. [1]
- June 2022, Paper 1, Q21(a)(i) (1 mark): Suggest two observations from the student’s experiment that would show that calcium is more reactive than magnesium. 1 2 [1]
- June 2022, AS Paper 2, Q2(a)(i) (1 mark): Write an equation for the reaction of strontium with water. [1]
- June 2022, AS Paper 2, Q2(a)(ii) (2 marks): Using oxidation numbers, explain why the reaction of strontium with water is a redox reaction. [2]
- June 2022, AS Paper 2, Q2(a)(iii) (3 marks): Explain why calcium reacts more slowly with water than strontium does. [3]
- November 2021, AS Paper 2, Q6(c)(ii) (2 marks): The student observes that the rate of reaction for barium is different from the rate of reaction with strontium. On Fig. 6.1 sketch the graph the student would
- November 2021, AS Paper 2, Q6(c)(iii) (4 marks): Describe and explain the difference in reactivity of barium and strontium with water. [4]
- November 2020, Paper 1, Q14 (1 mark): Which statement(s) for Group 2 elements is/are correct? 1 The 2nd ionisation energy of magnesium is greater than the 2nd ionisation energy of calcium. A stronti
- 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
- November 2020, AS Paper 2, Q3(b)(ii) (3 marks): The reaction of barium with bromine is more vigorous than the reaction of calcium with bromine. Explain why. [3]
- June 2019, AS Paper 2, Q1(c)(i) (1 mark): Write the equation for the reaction of strontium with water. [1]
- June 2019, AS Paper 2, Q1(c)(ii) (2 marks): Describe two observations which would be different if the student had used calcium in place of strontium. 1 2 [2]
- June 2017, Paper 1, Q17(b) (3 marks): The reactivity of the Group 2 elements Mg–Ba increases down the group. Explain why. [3]
- June 2016, AS Paper 2, Q1(a)(ii) (1 mark): Explain what happens when magnesium is oxidised in terms of electron transfer. [1]
- June 2016, AS Paper 2, Q1(c)(i) (2 marks): Draw a labelled diagram of the apparatus that can be used to carry out this experiment. [2]
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