Balance the following equation by oxidat...

Balance the following equation by oxidation number method:
`K_(2)Cr_(2)O_(7)+FeSO_(4)+H_(2)SO_(4) to Cr_(2)(SO_(4))_(3)+Fe_(2)(SO_(4))+K_(2)SO_(4)+H_(2)O`

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The correct Answer is:

6

`CaSO_(4),Na_(2)SO_(4),BaSO_(4),Al_(2)(SO_(4))_(3),ZnSO_(4)`
`K_(2)SO_(4)` are white in colour.

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