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Schottky defect is observed in crysta...

Schottky defect is observed in crystals when ……………. .

A

some cations move from their lattice site to iterstitial sites.

B

equal number of cations and anions are missing from the lattice

C

some lattice sites are occupied by electrons

D

some impurity is present in the lattice.

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The correct Answer is:
B
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MODERN PUBLICATION-SOLID STATE-NCERT EXEMPLAR PROBLEMS (MULTIPLE CHOICE QUESTIONS) (TYPE I)
  1. graphite cannot be classifed as ………… .

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  2. Cations are present in the interstitial sites in …………… .

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  3. Schottky defect is observed in crystals when ……………. .

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  4. Which of the following is true about the change the charge acq...

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  5. To get a n- type semiconductor from silicon , it should be doped...

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  6. The total of tetrahedral voids in the face centred unit cell is ……...

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  7. Which of the following point defects are shown by AgBr (s) crys...

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  8. In which pair most efficient packing is present?

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  9. The percentage of empty space in a body centred cubic arrangement is :

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  10. Which of the following statements is not true about the hexagon...

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  11. in which of the following structures coordination number for cati...

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  12. What is the coordination number in a square close packed structures in...

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  13. which kind of defects are introduced by doping ?

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  14. Silicon doped with electron rich impurity forms ………..

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  15. Which of the following statements is not true ?

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  16. which of the following is not true about the ionic solids ?

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  17. A ferromagnetic substance becomes a permanent magnet when it is placed...

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  18. The correct order of the packing effeciency in different types of uni...

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  19. which of the follwing defects is also known as dislocation defect ...

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  20. in the cubic packing , the unit cell has ………. .

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