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NEET Chemistry The Solid State / ठोस प्रावस्था Question Bank Self Evaluation Test - The Solid State

  • question_answer
    What is the energy gap between valence band and conduction band in crystal of insulators?

    A) Both the bands are overlapped with each other

    B) Very small

    C) Infinite

    D) Very large

    Correct Answer: D

    Solution :

    [d] When insulators (non metal atoms) interact to form a solid, their atomic orbitals mix to form two bunch of orbitals, separated by a large band gap. Electrons cannot therefore be promoted to an empty level, where they could move freely.


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