Question:
The correct group of halide ions which can be oxidised by oxygen in acidic medium is
The correct group of halide ions which can be oxidised by oxygen in acidic medium is
Updated On: Feb 4, 2026
- Br- and I- only
- CI- Br- and I- only
- I- only
- Br- only
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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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