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Deduce from the following E^(c-) values ...

Deduce from the following `E^(c-)` values of half cells, what combination of two half cells would results in a cell with the largest potential?
`{:(I. , A+e(-) rarr A^(c-),,,,E^(c-)=-0.24V),(II., B^(c-)+e^(-)rarr B^(2-),,,,E^(c-)=+1.25V),(III.,C^(c-)+2e^(-) rarr C^(3-),,,,E^(c-)=-1.25V),(IV. , D+2e^(c-)rarr D^(2-),,,, E^(c-)=+0.68V):}`

A

`II,IV`

B

`II,III`

C

`III,IV`

D

`I,II`

Text Solution

Verified by Experts

The correct Answer is:
b
`II` and `IIIimplies E^(c-)._(cell)=1.25-(-1.25)=2.5V`
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