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Wich is the incorrect statement?...

Wich is the incorrect statement?

A

`FeO_(0.98)` has non stoichiometric metal deficiency defect

B

Density decreases in case of crystals with Schottky's defect

C

NaCl(s) is insulator, silicon is semiconductor, silver is conductor, quartz is piezo electric crystal

D

Frenkel defect is favoured in those ionic compounds in which sizes of cation and anions are almost equal

Text Solution

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The correct Answer is:
A, D
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