wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

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

A
Positive
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
Fixed
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
Zero
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Negative
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A Positive
Any redox reaction would occur spontaneously if the free energy change, (ΔG) is negative.

Relation between ΔG and Ecell is

ΔG=nFEcell
At standard condition,
ΔG0=nFE0cell

where,
n is the number of electrons involved in the reaction.
F is the Faraday constant
E0 is the cell emf

If ΔG0 is negative, then the E0 value will be positive.
Thus, for a feasible redox reaction, emf of the cell should be positive.

flag
Suggest Corrections
thumbs-up
3
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Oxidation Number and State
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon