1.

Assertion : Zone refining method is very useful for roducing semiconductors. Reason: Semiconductors are of high purity.

Answer»

Both assertion and reason are TRUE and reason is the correct explanation of assertion. 
Both assertion and reason are true but reason is not the correct explanation of assertion. 
Assertion is true but reason is false. 
Assertion is false but reason is true. 

Solution :IMPURITIES of semiconductors are more soluble in molten STATE than in solid state.


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