Question

$Zn|{Zn}^{2+}\left(C_1\right)\parallel {Zn}^{2+}\left(C_2\right)|Zn$ for this cell $\Delta G$ is negative if :-

• A. $C_1=C_2$
• B. $C_1>C_2$
• C. $C_2>C_1$
• D. None

Answer 1

The correct option is C $C_2>C_1$

$E_{cell}=E_o-\frac{RT}{2F}\times ln\left(\frac{Z{n}^{2+}}{Z{n}^{2+}}\right)$

$E_{cell}=E_o-\frac{RT}{2F}\times ln\left(\frac{C_1}{C_2}\right)$

$E_o=0$

$E_{cell}=\frac{RT}{2F}\times ln\left(\frac{C_1}{C_2}\right)$

For $\Delta G<0$, $E_{cell}$ should be positive, hence $C_2>C_1$

So, option C is correct.