A copper refining cell consists of two parallel copper plate electrodes 5 cm apart and 1 metre squre, immersed in a copper sulphate solution of resistivity `12xx10^(-2)Omegam`. Then the potential difference which must be established between the plates to provide a constant current to deposit `0.66kg` of copper on cathode in one hour is nearly `(Z=3.33xx10^(-7)kg//C)`A. 0.6VB. 0.33VC. 3.0VD. 15V

A copper refining cell consists of two parallel copper plate electrode

1.	A copper refining cell consists of two parallel copper plate electrodes 5 cm apart and 1 metre squre, immersed in a copper sulphate solution of resistivity `12xx10^(-2)Omegam`. Then the potential difference which must be established between the plates to provide a constant current to deposit `0.66kg` of copper on cathode in one hour is nearly `(Z=3.33xx10^(-7)kg//C)`A. 0.6VB. 0.33VC. 3.0VD. 15V
Answer» `m=Zit=Z((V)/(R))t` `rARr V=(mR)/(Zt)=(mrhol)/(Zat)` `=(0.66xx1.2xx10^(-2)xx5xx10^(-2))/(3.33xx10^(-7)xx1xx60xx60)` =0.33 volt

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