You have three impure samples of zinc, copper and germanium. Mention the appropriate processes employed for the purification or refining of these metals.

Mention two primary requirements for the purification of metals by Mond process and van-Arkel process.

Mention any three processes where transition metals acts as catalysts.

How is impure copper refined by the process of electrolyte.

Three sample, A,B,C of a gas initially have the same volume. The volume of each sample is doubled by the following processes: (i) isothermal process on A, (ii) adiabatic process on B, and (iii) isobaric process on C. In which process will the work done be highest?

{:("Column - I","Column - II"),("(A) Coloured bands","(i) Zone refining"),("(B) Volatile compound from impure metal","(ii) Fractional distillation"),("C) Purification of Ge and Si","(iii) Mond process"),("(D) Purification of Hg","(iv) Chromatography"),(,"(v) Liquation"):}