An equimolar mixture of Na(2)C(2)O(4) an...

An equimolar mixture of `Na_(2)C_(2)O_(4)` and `KHC_(2)O_(4)3H_(2)C_(2)O_(4)` required `V_(1)` litre of `0.1MKMnO_(4)` ion acidic medium for complete oxidation. The same amount of mixture required `V_(2)` litre of `0.2M NaOH` for complete neutralization. What os the ratio of `V_(1):V_(2)` ?

`4:7`

`10:7`

`8:7`

`2:7`

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