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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

`-1.20 V`

B

`+1.20` V

C

`+0.32 V`

D

`-0.32 V`

Text Solution

Verified by Experts

The correct Answer is:
D
`E_("cell")^(@)=E_("cathode")^(@)-E_("Anode")^(@)`
`=E_(Fe^(2+)"|"Fe)^(@)-E_(Zn^(2+)"|"Zn)^(@)`
`= -0.44-(-0.76)`
`= +0.32V`
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