Dilute sulfuric acid is electrolysed using inert electrodes. Which of the following statements are correct? 1 Hydrogen is given off at the negative electrode. 2 Oxygen is given off at the positive electrode. 3 Sulfur dioxide is given off at the positive electrode. 4 The acid becomes more concentrated.
- A1, 2 and 4
- B1 and 2 only
- C2 and 3
- D3 and 4