In the process of refining of metals, the impure metal is made as

The correct answer is 'option 2'

Concept:

In electrolytic refining the impure metal is made as an anode and the pure metal is made as a cathode.

• Electrolytic refining is a way of purifying impure metals by using electricity.
• The anode in this process is impure metal, while the cathode is a strip of pure metal.
• A soluble salt of the same material as the electrolyte is used to make a solution.
• When an electric current is transmitted, metal ions from the electrolyte are deposited as a pure metal in the cathode, and the impure metal from the anode dissolves in the form of ions into the electrolyte.
• Below the anode, the impurities of metals are collected, and it is known as mud anode.