During the reaction of permanganate with thiosulphate, the change in oxidation of manganese occurs by value of 3. Identify which of the below medium will favour the reaction

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Both aqueous acidic and neutral

Both aqueous acidic and faintly alkaline

Aqueous acidic

Aqueous neutral

answer is A.

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Detailed Solution

The reaction of potassium permanganate with sodium thiosulfate gives sodium sulfate, potassium sulfate and insoluble manganese dioxide

KMnO₄+Na₂S₂O₃.5H₂O→Na₂SO₄+K₂SO₄+MnO₂

$\overset{+ 7}{Mn} O_{4} \to \overset{+ 4}{Mn} O_{2}$

Change in oxidation state=3

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