Question

During the process of electrolytic refining of copper, some metals present as impurity settle as anode mud. These are-

• A. $PbandZn$
• B. $SnandAg$
• C. $FeandNi$
• D. $AgandAu$

Answer 1

The correct option is D $AgandAu$

In electrolytic refining impure metal is made to act as an anode. A strip of the same metal in pure from used as cathode.
More basic metal remains in solution and less basic solution goes to anode mud.
Copper is refined and impurities of $Se,Te,Sb,Ag$ and $Au$ deposited as anode mud.
Recovery of these elements may meet the cost of refining.