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Which is the incorrect statement...

Which 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 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

Verified by Experts

The correct Answer is:
A, D
(a) `FeO_(0.98)` has a non-stoichiometric metal excess defect (Compare this molecule with ) FeO.
(d) Frenkel defect is favoured in those ionic compounds if there is a large difference between sizes of cation and anions.
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