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A sample of FeSO(4) and FeC(2)O(4) is di...

A sample of `FeSO_(4)` and `FeC_(2)O_(4)` is dissolved in `H_(2)SO_(4)` . The complete oxidation of sample required 8/3 eq. of `KMnO_(4)`. After oxidation , the reaction mixture was reduced by Z. On again oxidation by `KMnO_(4) ` required `5/3` eq. The mole ratio of `FeSO_(4)` and `FeC_(2)O_(4)` is

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The correct Answer is:
`7/3`
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