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

$A$ metal which is refined by poling is

In electrorefining of metals,the anode and cathode are taken as a thick slab of impure metal and a strip of pure metal,respectively,while the electrolyte is a solution of a complex metal salt. This method cannot be applied for the refining of:

Identify the correct statement from the following:

Which of the following pairs is correctly matched?

In order to refine "blister copper",it is melted in a furnace and stirred with green logs of wood. The purpose is: