0.56 g of limestrone was treated with oxalic acid to give `CaC_(2)O_(4)`. The precipitate decolouris
Channel: Doubtnut
Date: 2020-07-12

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.