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0.56 g of lime stone was treated with ox...

`0.56 g` of lime stone was treated with oxalic acid to give `CaC_(2)O_(4)`. The precipitate decolorized `45 ml` of `0.2N KMnO_(4)` in acid medium. Calculate `%` of `CaO` in lime stone.

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0.56 g of limestrone was treated with oxalic acid to give CaC_(2)O_(4) . The precipitate decolourised 50 " mL of " (M)/(25) KMnO_(4) in acidic medium. Calculate percentage of CaO in limestone.

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