MCQ
Cell reaction is spontaneous, when
- A$E_{red}^o$ is negative
- ✓$\Delta G$ is negative
- C$E_{oxi}^o$ is positive
- D$\Delta G$ is positive
✓
Answer
Correct option: B.
$\Delta G$ is negative
b
$E _{\text {cell }}$ is an intensive parameter but $\Delta G$ is an extensive property. Thus depends on $n$.
$E _{\text {cell }}$ is an intensive parameter but $\Delta G$ is an extensive property. Thus depends on $n$.
If the electrode potential is assumed to be positive then, When $\Delta G\, <\,0$, the cell reaction is spontaneous.
When $\Delta G \,>\,0$, the cell reaction is non-spontaneous.
When $\Delta G \,=\,0$, the reaction is in equilibrium.
Therefore, the correct answer is option $B$.
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