COMEDK Exam 2014 Solved Paper

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Question : 83 of 180

Marks: +1, -0

Schottky defect in crystals is observed when

an ion leaves its normal site and occupies an interstitial sit
unequal number of cations and anions are missing from the crystal lattice.
equal number of cations and anions are missing from the crystal lattice.
there is large difference in size of positive and negative ions.

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