Question:
Identify the incorrect statement from the options below for the above cell :
Correct Option: , 2
Solution:
$\mathrm{E}_{\text {cell }}^{0}=\mathrm{E}_{\mathrm{Cu}^{2+}}^{0}{\mid \mathrm{Cu}}^{-}-\mathrm{E}_{\mathrm{Zn}^{2+} \mid \mathrm{Zn}}^{0}=1.1 \mathrm{~V}$
So, if $\mathrm{E}_{\text {ext. }}=1.1 \mathrm{~V}$ no electron will flow
At, $\mathrm{E}_{\text {ext. }}>1.1 \mathrm{~V}$ cell act as electrolytic cell and electron will flow from $\mathrm{Cu}$ to $\mathrm{Zn}$.
At, $\mathrm{E}_{\text {ext. }}<1.1 \mathrm{~V}$ cell act as electrochemical cells so $\mathrm{Zn}$ dissolve and $\mathrm{Cu}$ deposit.
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