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The number of specie(s) which can react ...

The number of specie(s) which can react with acidified `KMnO_(4)` out of the following specie(s) is /are `FeSO_(4),Fe_(2)(SO_(4))_(3),O_(3),FeC_(2)O_(4),CuSO_(4),Cu_(2)S,H_(2)O_(2),NO_(2)^(-),NO_(3)^(-),SO_(3)^(2-)`

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