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Aluminium displaces hydrogen fromacids, ...

Aluminium displaces hydrogen fromacids, but copper does not. A galvanic cell prepared by combining `Cu|Cu^(2+)` and `Al|Al^(3+)` has an emf of 2.0V at 298K. If the potential of copper electrode is +0.34V, that of aluminium electrode is

A

`-2.3V`

B

`+2.34V`

C

`-1.66V`

D

1.66V

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