`Cr_(2)O_(7)^(2-)overset(H^(+))rarrCr^(3+)`, Eq. wt. of `Cr_(2)O_(7)^(2-)` is :-
`Cr_(2)O_(7)^(2-)overset(H^(+))rarrCr^(3+)`, Eq. wt. of `Cr_(2)O_(7)^(2-)` is :-
A. mol. Wt/6
B. mol. Wt/3
C. mol. Wt/4
D. mol. Wt/1
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Correct Answer - A
Reduction of `Cr_(2)O_(7)^(2-)` to `Cr^(3+)` is `6e^(-)` change
`Cr_(2)O_(7)^(2-)+14H^(+)+6e^(-)rarr2Cr^(3+)+7H_(2)O`
`:.` Eq. wt of `Cr_(2)O_(7)^(2-) =` Mol. Wt/6.
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