Question

In the metallurgical process for the electro-refining of the metal, the anode is made of_____ metal.
$A.$ Impure
$B.$ Pure
$C.$ Refine
$D.$ None of the above

Answer 1

The process of extracting metal from their ores and refining them is called metallurgy. In metallurgy there are many processes of refining or purification such as Liquidation, Distillation, and Oxidation and Electrolytic method and so on.

Complete step by step answer:
By electro-refining large numbers of metals like copper, silver, gold, zinc and nickel are purified by this method. The impure metal is made of anode while the tin sheet of pure metal acts as cathode. The electrolyte is generally an aqueous solution of a salt or a complex of the metal. On passing the electric current. The pure metal starts depositing on the cathode through the solution. The soluble impurities pass in the solution while the insoluble impurities collect below the anode as anode mud. The valuable metal can be recovered from this anode mud.
Thus, the correct option is $A.$

Additional Information
Ores: The mineral from which the metal may be extracted economically and conveniently are called ores.
Mineral: The natural material found in the earth in which the metal occur in combined form are called mineral
Most important all the ores are mineral but the entire mineral is not ores. For example all clay contains aluminium but these are not ores of aluminium.

Note:
The process used for extraction of metal from their ores depends upon the nature of the ore from the metal being extracted and also depends on the properties of metal for example if a metal is magnetic in nature so it can extract through the Electro-magnetic separation method. Thus it is not possible to chalk out a universal method which is applicable for all the metal.