BHU PMT BHU PMT (Screening) Solved Paper-2008

  • question_answer
    Schottky defect in crystals is observed when.

    A)  unequal number of cations and anions is missing from the crystal lattice.

    B)  equal number of cations and anions is missing from the crystal lattice.

    C)  an anion leaves its normal site and occupies an interstitial site.

    D)  density of the crystal is increased.

    Correct Answer: B

    Solution :

                     In an ionic crystal, equal number of cations and anions are missing from their lattice sites so that the electrical neutrality is maintained, it is called Schottky defect


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