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Which is the incorrect statement-...

Which is the incorrect statement-

A

density decreases in case of crystals with Schottky defect

B

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

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:
C
In Frenkel defect, the radius of cations are smaller than that of anions present in unit cell.
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  5. Iron exhibits bcc structure at room temperature. Above 900^(@)C, it tr...

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  7. CsCl has bcc arrangement. Its unit cell edge length is 400 pm. Its int...

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  8. If Si is doped with B-

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  9. In bcc structure contribution of corner and central atom is-

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  10. In a solid, atom M occupies ccp lattice and 1/3rd of tetrahedral voids...

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  11. A forms hcp lattice and B are occupying 1/3rd of tetrahedral voids, th...

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  12. Ca^(2+)andF^(-) are located in CaF(2) crystal, respectively at face-ce...

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  13. Addition of group-13 elements to intrinsic semiconductors result in-

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  14. The yellow colour in NaCl crystals is due to-

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  16. If an atom crystallises in bcc lattice with r = 4Å then the edge lengt...

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  17. ZnO is white when cold and yellow when heated. It is due to the develo...

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  18. A forms hcp lattice and B are occupying 1/3rd of tetrahedral voids, th...

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  19. F-centre is-

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