1.

Ii) A student gradually adds dilute ferroussulphate solution to a conical flask containingacidified potassium permanganate solution.The light purple colour of the solution fadesand finally, it becomes colourless. Which ofthe following is correct regarding the aboveobservation?(a) Potassium permanganate oxidises ferroussulphate. (b) Potassium permanganate reducesferrous sulphate. (c) Ferrous sulphate oxidisespotassium permanganate. (d) Potassiumpermanganate is an unstable compound andundergoes decomposition to form a colourlesscompound​

Answer»

option a.

Since Potassium permanganate (KMnO₄) is QUITE an UNSTABLE compound, it tends to decompose in the presence of FERROUS sulphate (FeSO₄). This changes the colour of the solution from PURPLE to colourless.



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