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For the feasibility of a redox reaction ...

For the feasibility of a redox reaction in a cell, the emf should be.

A

Positive

B

Fixed

C

Zero

D

Negative

Text Solution

Verified by Experts

The correct Answer is:
A
Any redox reaction would occur spontaneously if the free energy change `(DeltaG)` is negative.
`DeltaG^(o)=-nFE^(o)`
Where n is the number of electrons involved, F is the value of faraday and `E^(o)` is the cell emf. `DeltaG^(o)` can be negative if `E^(o)` is positive.
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