Question

Write the principles involved in the following methods of refining of metals: 

(i) Zone refining 

(ii) Chromatographic method 

(iii) Electrolytic refining

Answer 1

(i) The impurities are more soluble in the molten state than in the solid state of the metal.

(ii) Different components of a mixture are differently adsorbed on the surface of adsorbent.

(iii) The more basic/ reactive metal gets deposited at the cathode and the less basic/reactive one go to the anode mud.