In which among the following solids is Schottky defect NOT observed?

ZnS

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NaCl

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KCl

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CsCl

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Solution

The correct option is A ZnS
Schottky defect is shown by compounds when cation and anions have similar sizes. We can observe shottky defect in NaCl, KCl, CsCl. The sulfide ion is a lot bigger than the zinc ion, ZnS shows Frenkel defects.

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