In electrorefining of copper,some gold is deposited as

In the electrorefining of copper, some gold is deposited as :

In the electrorefining of copper,some gold is deposited as:

In electrorefining of copper, the anode is

In electrorefining of copper , pure copper is obtained :

During electrorefining of copper, a pure copper is made the ............

What is the current efficiency of an electro-deposition of copper is deposited of copper metal from CuSO_(4) solution in which 9.80 g copper is deposited by the passage of 5 ampere current for 2 hour?