E Cu 2 + | Cu 0 = + 0 .34   V E Zn 2 + | Zn 0 = − 0 .76   V Identify the incorrect statement…

${\mathrm{E}}_{{\mathrm{Cu}}^{2+}|\mathrm{Cu}}^0=+0.34 \mathrm{V}$
${\mathrm{E}}_{{\mathrm{Zn}}^{2+}|\mathrm{Zn}}^0=-0.76 \mathrm{V}$
Identify the incorrect statement from the options below for the above cell:

1. If ${\mathrm{E}}_{\mathrm{ext}}>1.1 \mathrm{V}, {\mathrm{e}}^{–}$ flow from $\mathrm{Cu}$ to $\mathrm{Zn}$
2. If ${\mathrm{E}}_{\mathrm{ext}}>1.1 \mathrm{V}, \mathrm{Zn}$ dissolves at $\mathrm{Zn}$ electrode and $\mathrm{Cu}$ deposits at $\mathrm{Cu}$ electrode
3. If ${\mathrm{E}}_{\mathrm{ext}}<1.1 \mathrm{V}, \mathrm{Zn}$ dissolves at anode and $\mathrm{Cu}$ deposits at cathode
4. If ${\mathrm{E}}_{\mathrm{ext}}=1.1 \mathrm{V},$ no flow of ${\mathrm{e}}^{–}$ or current occurs

Solution

Asked in: JEE Main 2020 (04 Sep Shift 1)

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