Aluminium metal is purified by

Which method is used to obtain highly pure $Si$?

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

The reaction representing the $Mond$ process for metal refining is $............$.

The purification of $Zr$ (Zirconium) is carried out by the $Van$ $Arkel$ method. Which halogen is used in this process?

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