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An aqueous compound of an inorganic comp...

An aqueous compound of an inorganic compound `(X)` shows the following reactions:
a. it decolourises and acidified `KMnO_(4)` solution accompanied by the evolution of oxygen.
b. it liberates `I_(2)` from an acidified `KI` solution.
c. It gives a brown precipitate with alkaline `KMnO_(4)` solution with evolution of oxygen.
d. It removes black stains from old oil paintings. Identify `(X)` and give chemical equations for the reaction at steps (a) to (d).

Text Solution

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`X-H_(2)O_(2)`
`5H_(2)O_(2)+2KMnO_(4)+3H_(2)SO_(4) rarr K_(2)SO_(4)+2MnSO_(4)+8H_(2)O+5 O_(2)`
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