A-LevelChemistryElectrochemistry9701/12 · Feb/Mar 2018 · Q171 Mark

Bromine is extracted from sea-water. In the final stages of the process two redox reactions take place. Br₂(aq) + SO₂(g) + 2H₂O(l) → 2HBr(aq) + H₂SO₄(aq) 2HBr(aq) + Cl₂(g) → Br₂(g) + 2HCl(aq) Which row is correct?

ABr₂ SO₂ Cl₂

BCl₂ Br₂ SO₂

CCl₂ SO₂ Br₂

DSO₂ Br₂ Cl₂

✓ Correct answer

B: Cl₂ Br₂ SO₂

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Topic: Electrochemistry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Feb/Mar 2018 Paper 1 Variant 2, question 17.

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