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The standard electrode potentials E^(@) ...

The standard electrode potentials `E^(@)` for the half cell reactions are as :
`ZntoZn^(2+)+2e^(-),E^(@)=0.76V`
`FetoFe^(2+)+2e^(-),E^(@)=041V`
The EMF of the cell reaction `Fe^(2+)+ZntoZn^(2+)+Fe` is :

A

`-0.35 V`

B

`+0.35 V`

C

`+1.17 V`

D

`-1.17 V`.

Text Solution

Verified by Experts

The correct Answer is:
B
`E_("cell")^(@) =E_("cathode")^(@)-E_("anode")^(@)`
`=E(Fe^(2+)|Fe)-E(Zn^(2+)|Zn)`
`=-0.41-(-0.76)=035V`
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