Question

Semiconductor materials like $Si$ and $Ge$ are usually purified by:

• A. distillation
• B. zone refining
• C. liquation
• D. electrolytic refining

Answer 1

The correct option is B zone refining

Semiconductor materials like $Si$ and $Ge$ are usually purified by zone refining. Zone refining is based on the principle of fractional crystallisation. Due to differences in solubilities of impurities in solid and molten states of metal, the zones of impurities are formed and finally removed.