Which of the following pairs is correctly matched?

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 $Pt$

Vapour phase refining method is applicable on

Explain the Van Arkel method with an example.

The formation of $Ni(CO)_4$ and its subsequent decomposition into $Ni$ and $CO$ forms the basis of the Mond process.
$Ni + 4CO$ $\xrightarrow{T_1} Ni(CO)_4$ $\xrightarrow{T_2} Ni + 4CO$
What are the values of $T_1$ and $T_2$?

Bessemer converter is used in the refining of