The correct group of halide ions which can be oxidised by oxygen in acidic medium is :
Solution
Only iodide ions (I⁻) can be oxidized by oxygen in acidic medium. The correct option is :
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Option D : $\mathrm{I}^{-}$ only
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The reaction is :
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$$4 \mathrm{I}^{-}(\mathrm{aq})+4 \mathrm{H}^{+}(\mathrm{aq})+\mathrm{O}_2(\mathrm{~g}) \rightarrow 2 \mathrm{I}_2(\mathrm{~s})+2 \mathrm{H}_2 \mathrm{O}(\mathrm{l})$$
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In this reaction, iodide ions (I⁻) are oxidized to iodine (I₂) by oxygen in the presence of an acidic medium.
About this question
Subject: Chemistry · Chapter: p-Block Elements · Topic: Group 13: Boron Family
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