In acidic medium Cr2O−27 is an oxidising agent Cr2O−27+14H++6e−→2Cr+3+7H2O [E∘Cr2O−27/Cr+3=1.33V] The electrode potential of half cell at pH = 1 keeping concentration of other species unity is:
A
2.1574V
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B
0.5026V
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C
1.1921V
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D
1.4679V
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Solution
The correct option is C1.1921V Cr2O2−7+14H++6e−⟶2Cr+3+7H2O