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For the cell Zn(s)|Zn^(2+)(aq)||M^(x+)(a...

For the cell `Zn(s)|Zn^(2+)(aq)||M^(x+)(aq)|M(s)` different half cells and their standard electrode potentials are given below :

If `E^(@)Zn^2+/Zn = -0.76 V` which cathode will given a maximum value of `E^@` cell per electron transferred ?

A

`Au^(3+)//Au`

B

`Fe^(3+)//Fe^(2+)`

C

`Fe^(2+)//Fe`

D

`Ag^+//Ag`

Text Solution

Verified by Experts

The correct Answer is:
D
`E_"Cell"^@` is an intensive property
`E_"cell"^@=E_"cathode"^@-E_"anode"^@`
Since `E_(Au^(3+)//Au)^0` has maximum standard Reduction Potential , `E_"cell"^@` will be maximum
`Zn(s)|Zn^(2+)||Au^(3+)|Au(s)`
`E_"cell"^@` =1.40-(-0.76)=2.16 V
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