During the process of electrolytic refining of copper,some metals present as impurity settle as 'anode mud'. These are

In the $Hoop$ process for the refining of $Al$,the molten materials form three different layers and remain separated during electrolysis because ..........

The zone refining method is used for the purification of which of the following?

In the electrolytic refining of blister copper,the total number of main impurities,from the following,removed as anode mud is .... .
$Pb, Sb, Se, Te, Ru, Ag, Au$ and $Pt$

Which process of purification is represented by the following equation?
$Ti_{\text{(Impure)}} + 2I_2$ $\xrightarrow{250^{\circ}C} TiI_4$ $\xrightarrow{1400^{\circ}C} Ti_{\text{(Pure)}} + 2I_2$

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