acts as an oxidizing agent in an acidic medium. The number of moles of that will be needed to react with one mole of sulphide ions in an acidic solution is
| 1. | \(\dfrac{2}{5}\) | 2. | \(\dfrac{3}{5}\) |
| 3. | \(\dfrac{4}{5}\) | 4. | \(\dfrac{1}{5}\) |
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