General Principles And Processes Of Isolation Of Elements Ques 10
10. Method used for obtaining highly pure silicon used as a semiconductor material, is
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(a) Oxidation
(b) Electrochemical
(c) Crystallization
(d) Zone refining
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Answer:
Correct Answer: 10.(d)
Solution:
- (d) $Si$ obtained by reduction of $SiCl_4$ with $H_2$ is further purified by zone refining method to get $Si$ of very high purity.
Silicon is purified by zone-refining process because the impurities present in it are more soluble in the liquid phase than in the solid phase.
BETA
