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12th Class Chemistry The Solid State / ठोस प्रावस्था Question Bank 12th CBSE Chemistry The Solid State

  • question_answer
      Although pure silicon is an insulator, how does it behave as a semiconductor on heating?                                           [Delhi 1997]

    Answer:

      Small gap between the valence band and conduction band allows electrons to jump from valence band to conduction band. This causes the conduction of electricity by  semiconductors.


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