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

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

What is the process of refining aluminum by the electrolytic refining method called?

Which of the following elements is purified by vapour phase refining?

Copper is purified by electrolytic refining of blister copper. The correct statement$(s)$ about this process is(are):
$(A)$ Impure $Cu$ strip is used as cathode
$(B)$ Acidified aqueous $CuSO_4$ is used as electrolyte
$(C)$ Pure $Cu$ deposits at cathode
$(D)$ Impurities settle as anode-mud

Identify the statements which are not correct.
$a)$ Copper is refined by Van-Arkel method
$b)$ Zinc is refined by electrolysis method
$c)$ Zirconium is refined by distillation method