. Cell reaction is spontaneous when
(a) ΔG° is negative
(b) ΔG° is positive
(c) ΔE°red is positive
(d) ΔE°red is negative.
Correct Option is : (a)
For a cell reaction to be spontaneous
ΔG° should be negative.
As ΔG° = –nFE°cell, so the value will be –ve only when the E°cell is +ve.