In the following unbalanced redox reacti...

In the following unbalanced redox reaction,
`Cu_(3)P+Cr_(2)O_(7)^(2-) rarr Cu^(2+)+H_(3)PO_(4)+Cr^(3+)`
Equivalent weight of `H_(3)PO_(4)` is

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The correct Answer is:

D

`P^(-3) underset(n=8)(to) H_(3) overset(+5)(PO_(4)) implies 1mol H_(3)PO_(4) equiv 8 mol e^(-)`

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