Redox Reactions And Electrochemistry Ques 228
Question: For the feasibility of a redox reaction in a cell, the e.m.f. should be [J & K 2002]
Options:
A) Positive
B) Fixed
C) Zero
D) Negative
Show Answer
Answer:
Correct Answer: A
Solution:
Any redox reaction would occur spontaneously if the free energy change $ (\Delta G) $ is negative. $ \Delta G^{o}=nFE^{o} $ Where $ n $ is the number of electrons involved, $ F $ is the value of Faraday and $ E^{o} $ is the cell emf. $ \Delta G^{o} $ can be negative if $ E^{o} $ is positive.
