Park's process is used in the extraction of

Poling is employed in the refining of:

In the electrolytic refining of metals,the electrolysis of an aqueous solution of its complex salt is performed using an impure metal as the anode and a strip of pure metal as the cathode. This method cannot be used for the refining of which of the following metals?

$A$ low boiling point metal contains a high boiling point metal as an impurity. The correct refining method is:

The Orford process is used in the extraction of

The metal that can be purified economically by fractional distillation method is: