Which of the following elements is extracted using $I_2$ as the reactant?

Given below are two statements.
Statement $I:$ During electrolytic refining,blister copper deposits precious metals.
Statement $II:$ In the process of obtaining pure copper by electrolysis method,blister copper is used to make the anode.
In the light of the above statements,choose the most appropriate answer from the options given below.

Which one of the following is most likely a mismatch?

One of the following metals forms a volatile carbonyl compound and this property is taken advantage of for its extraction. This metal is

In the electrolytic refining of copper,$Ag$ and $Au$ are found

Explain electrolytic refining.