Schottky defect: definition and properties

1. A.
   Vacancy defect
2. B.
   Self interstitial defect
3. C.
   Schottky defect
4. D.
   Frenkel defect

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1. A.
   After defect stoichiometry, the crystal remains unchanged.
2. B.
   After defect neutrality, the crystal's structure remains unchanged.
3. C.
   After defect density of crystal remains unchanged
4. D.
   It is a vacancy defect.

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1. A.
   The density of a substance decreases.
2. B.
   The electrical neutrality of the substance changes.
3. C.
   It is found in ionic compounds with larger difference between sizes of cation and anion.
4. D.
   It develops when smaller cations occupy interstial sites from their normal sites.

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1. A.
   The density of crystal increases.
2. B.
   Unequal number of cations and anions are missing from the lattice.
3. C.
   Either cation or anion leaves its normal site and occupies interstitial site.
4. D.
   Equal number of cations and anions are missing from their regular positions in the crystal lattice.

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