`100 mL` solution of `FeC_(2)O_(4)` and `FeSO_(4)` is compleltely oxidized by `60 mL` of `0.2M KMnO_(4)` in acid medium. The resulting soltuion is then reduced by `Zn` and dil. The reduced soltuion is again oxidized completely by `40 mL` of `0.2M KMnO_(4)`. Calculate normality of `FeC_(2)O_(4)` and `FeSO_(4)` in mixture.
