1.

The process involving transfer of five electrons is:

Answer»

`CrO_4^(2-) rarrCr^(3+)
`MnO_4^- rarrMn^(2+)`
`MnO_4^- rarrMnO_2`
`Cr_2O_7^(2-) rarr2Cr^(3+)`

ANSWER :A


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