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Chemistry · May / June 2017 · Paper 11 · Question 13

5070Electrolysis

Dilute sulfuric acid is electrolysed between inert electrodes. Which statements are correct? 1 Hydrogen is released at the negative electrode. 2 Oxygen is released at the positive electrode. 3 Sulfur dioxide is released at the positive electrode. 4 The acid becomes more concentrated.

  1. A1, 2 and 4
  2. B1 and 2 only
  3. C2 and 3
  4. D3 and 4

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Correct answer: A. 1, 2 and 4

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