Question
Chemistry Question on Refining
Elemental silicon to be used as a semiconductor is purified by
A
heating under vacuum
B
floatation
C
zone refining
D
electrolysis
Answer
zone refining
Explanation
Solution
Zone refining is used for metalsthat are required in very high purity. Semiconductor siliconis purified by this method.
Semiconductor materials like Si and Ge are usually purified by zone refining.
So, the correct answer is Option C) Zone refining.