1.

Writetheprincipleofthemethodusedforrefiningofgermanium.

Answer»

SOLUTION :Germaniumisrefinedbythemethodcalled 'zone refining'.Itisbasedontheprinciple thatthe impuritiesaremoresolubleinthemoltenstate(MELT ) thanin thesolidstateofthemetal.
Inother WORDS,whenthemeltofan impuremetalis allowedtocool,thepuremetalcrystallises outwhiletheimpuritiesremaininthe melt.


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