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The electrode with reaction :Cr(2)O(7)^(...

The electrode with reaction `:Cr_(2)O_(7)^(2-)(aq)+14H^(o+)(aq)+6e^(-) rarr 2Cr^(3+)(aq)+7H_(2)O` can be represented as

A

`Pt|H^(o+)(aq),Cr_(2)O_(7)^(2-)(aq)`

B

`Pt|H^(o+)(aq),Cr_(2)O_(7)^(2-)(aq),Cr^(3+)(aq)`

C

`Pt_(H2)|H^(o+)(aq),Cr_(2)O_(7)^(2-)`

D

`Pt_(H2)|H^(o+)(aq),Cr_(2)O_(7)^(2-)(aq),Cr^(3+)(aq)`

Text Solution

Verified by Experts

The correct Answer is:
d
`Cr_(2)O_(7)^(2-)` reduces to `2Cr^(3+)`, so much be represented at cathode. `H_(2)` is oxidized to `2H^(o+)`, so must be representedd at anode. So the cell representation is as shown in `(d)`.
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