Question

A Daniel Cell is made at $25^{°}C$ by connecting $Zn/{\left(Zn\right)}^{+2}\left(0.1M,1litre\right)\&$ $Cu/{\left(Cu\right)}^{+2}(0.9M,1litre)$ electrode.
The cell is discharged till its emf reaches $1.10$ volt, then it is charged (reversing the discharge process) by passing $0.6F$ charge.
$Given:E_{\frac{Zn}{Z{n}^{+2}}}^{°}=0.76V$
$E_{Cu/C{u}^{+2}}^{°}=-0.34V,\frac{2.303RT}{F}$
$=0.06,log2=0.30]$
Select the incorrect option is.

• A. Concentration of $Z{n}^{+2}$ becomes $1M$ when $EMF$ reach $1.10$ volt.
• B. Concentration of $C{u}^{+2}$ becomes $0.5M$ when $EMF$ reach $1.10$ volt.
• C. $EMF$ of the cell just after charging is $1.118$ volt.
• D. After charging concentration of $C{u}^{+2}$ becomes $0.8M$

Answer 1

Answer: (A)

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