Question

explain the process of coating copper on iron key . draw the circuit diagram.

Answer 1

since copper has more negative emf value thus gets first oxidise prevent corrosion of iron

Answer 2

Answer:

See the attachment for diagram

During copper plating of an iron key, copper metal is transferred from the copper plate to the iron key through the copper sulphate solution. During electroplating with copper, copper metal gets transferred from positive electrode to the negative electrode