plumiTests for halide ions: OCR A‑Level Chemistry A questions
OCR A-Level Chemistry A past-paper questions on 3.1.3.4 Tests for halide ions, 2016–2025, with mark schemes and examiner’s reports where available.
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Q22(c)
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Open the full PDFYour answerQ23(c)(i)
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All 8 questions on Tests for halide ions, as a list
- June 2025, AS Paper 1, Q22(c) (4 marks): A group of students is provided with aqueous solutions of sodium chloride, sodium bromide and sodium iodide in three unlabelled bottles. Explain how the student
- June 2024, Paper 3, Q2(b)(i) (1 mark): Write an ionic equation, with state symbols, for the reaction in Step 2. [1]
- June 2023, AS Paper 2, Q2(b)(iii) (2 marks): The student changes the method in 2(b). In step 2, the student adds an excess of silver nitrate solution, AgNO3(aq), instead of Na2SO4(aq). Explain whether this
- June 2022, Paper 3, Q4(b)(i) (1 mark): Explain why the Cl – concentration drops sharply at time = t1. [1]
- June 2018, AS Paper 1, Q23(a)(ii) (2 marks): At the end of the experiment, the student adds a few drops of aqueous sodium chloride to the reaction mixture in the polystyrene cup to test whether all the aqu
- June 2017, AS Paper 1, Q10 (1 mark): Which silver compound is insoluble in concentrated NH3(aq)? A AgNO3 B AgCl C AgBr D AgI Your answer [1]
- June 2016, AS Paper 1, Q23(c)(i) (1 mark): State the reagent needed for these precipitation reactions. [1]
- June 2016, AS Paper 1, Q23(c)(ii) (1 mark): How would the appearance of the precipitates allow you to distinguish between chloride, bromide and iodide ions? Chloride Bromide Iodide [1]
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