Question

When the total cell emf of a voltaic cell is greater than zero, which of the following is true about the reaction quotient Q and free energy change `DelatG` for the cell reaction ?
A. Q is less than one and `DeltaG` is greater than zero
B. Q greater than one and `DeltaG` is greater than zero.
C. Q is less than one and `DeltaG` is less than zero.
D. Q is greater than one and `DeltaG` is less than zero.

Answer 1

Correct Answer - C
(c ) `DeltaG=DeltaG^(@)+RT" In "Q`
It `E_(cell)` is +ve,`DeltaG` is -ve
(Cell working is feasible)
Similarly `E_(cell)` is -ve, `DeltaG^(@)` is -ve.
`:. RT " In "`Q is also -ve
or `Q lt t`.