The correct group of halide ions which can be oxidised by oxygen in acidic medium is
- Br- and I- only
- CI- Br- and I- only
- I- only
- Br- only
The Correct Option is C
Solution and Explanation
In acidic medium, only iodide ions (I\(^-\)) can be oxidized by oxygen to form iodine (\( \text{I}_2 \)). The reaction is as follows: \[ 4 \text{I}^- + 4 \text{H}^+ + \text{O}_2 \rightarrow 2 \text{I}_2 (s) + 2 \text{H}_2\text{O} (l). \] Chloride (Cl\(^-\)) and bromide (Br\(^-\)) ions are not oxidized by oxygen in acidic medium because their reduction potentials are not favorable for such oxidation under standard conditions.
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