1.

(a) Give an example of zone refining of metals. (b) What is the role of cryolite in the metallurgy of aluminium?

Answer» (a) This method is very useful for producing semiconductor and other metals of very high purity like germanium, silicon, boron etc.
(b) Role of cryolite in metallurgy of Aluminimm-Cryolite is added to lower the melting point pf mixture and to increase the conductivity of electrolyte.


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