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# The method is very useful for preparing semiconductors is

$(a)\;\text{Vapour Phase refining} \\(b)\;\text{Zone Refining} \\(c)\;\text{column chromatography} \\ (d)\;\text{electrolytic Refining}$
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The method is very useful for preparing semiconductors is Zone refining
Hence b is the correct answer.
answered Mar 18, 2014 by