Question

Ultra pure silicon is prepared by reduction of $Si{O}_2$ with carbon.

• A. True
• B. False

Answer 1

The correct option is B False

The given statement is false.
The true statement is
"Ultra pure silicon is prepared by zone refining".
Zone refining is based on the difference in solubility of impurities in molten and solid state of the metal. This technique is used for obtaining metals of very high purity. It is used for refining Ge, Si, Ga, gallium arsenide and indium antimonide.