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Chemistry · May / June 2016 · Paper 11 · Question 30

5070Extraction of metals

Which gases are all present at the positive electrode during the manufacture of aluminium?

  1. ACO, H2, CO2
  2. BCO, SO2, H2O
  3. CO2, CO, CO2
  4. DSO2, H2, O2

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Correct answer: C. O2, CO, CO2

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