O-LevelChemistryElectrolysis5070/12 · May/June 2017 · Q111 Mark
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.
A1, 2 and 4
B1 and 2 only
C2 and 3
D3 and 4
✓ Correct answer
A: 1, 2 and 4
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