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BITSAT2015ChemistryGeneral Principles and Processes of Isolation of MetalsActual

Semiconductor materials like Si and Ge are usually purified by

Options

  1. Adistillation
  2. Bzone refining
  3. Cliquation
  4. Delectrolytic refining

Correct answer

B. zone refining

Step-by-step solution

Semiconductor materials like Si and Ge are usually purified by zone refining. Zone refining is based on the principle of fractional crystallisation i.e. difference in states of metal, so that the zones of impurities are formed and finally removed.

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