Question

KMnO₄ acts as an oxidising agent in alkaline medium. When
alkaline KMnO₄ is treated with KI, iodide ion is oxidised
to ................. .
(a) I₂ (b) IO⁻
(c) IO₃⁻ (d) IO₄⁻

Answer 1

KMnO₄ acts as an oxidising agent in alkaline medium. When

alkaline KMnO₄ is treated with KI, iodide ion is oxidised

to ................. .

(a) I₂

(b) IO⁻

(c) IO₃⁻ (d) IO₄⁻

Answer 2

When  alkaline KMnO₄ is treated with KI, iodide ion is oxidised  to

(c) IO₃⁻

When KMnO₄ reacts with KI in alkaline medium, it acts as an oxidising agent.

Here I⁻, in KI, where oxidation state of I is -1 is oxidised to IO₃⁻, where oxidation state is +5.

The oxidation reaction showing the transformation is shown below.

2KMnO₄ + H₂O + KI → 2MnO₂ + 2 KOH + KIO₃

So, the option (c) is correct.