State the property of sulphur dioxide which causes potassium permanganate to change its colour from purple to colourless?

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Solution

Sulphur dioxide is a strong reducing agent.
Therefore, when it is passed in potassium permanganate $(K_{2} {SO}_{4})$ (purple), its colour changes to colourless due to the formation of potassium sulphate $(K_{2} {SO}_{4})$ .
$2 {KMnO}_{4} (l) + 5 {SO}_{2} (g) + 2 H_{2} O (l) \to K_{2} {SO}_{4} (l) + 2 Mn {SO}_{4} (l) + {2 H}_{2} {SO}_{4} (l) (Potassium (Potassium permanganate) sulphate)$

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which property of sulphur dioxide is represented when it changes pink potassium permangante to colourless?

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State the property of sulphur dioxide which causes potassium permanganate to change its colour from purple to colourless?

Sulphur dioxide is a strong reducing agent. Therefore, when it is passed in potassium permanganate (K2SO4)(purple), its colour changes to colourless due to the formation of potassium sulphate(K2SO4).2KMnO4(l)+5SO2(g)+2H2O(l)→K2SO4(l)+2MnSO4(l)+2H2SO4(l)(Potassium(Potassiumpermanganate)sulphate)