A-LevelChemistryElectrochemistryFeb/Mar 2018Paper 1 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
The correct answer is B. This question tests the candidate's understanding of electrochemistry within the Chemistrysyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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