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Schottky defect is observed in crystals ...

Schottky defect is observed in crystals when-

A

some cations move from their lattice site to interstitial 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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CHHAYA PUBLICATION-SOLID STATE-SOLVED NCERT EXEMPLAR PROBLEMS
  1. Graphite cannot be classified 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 charge acquired by p-type sem...

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

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

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  7. Which of the following point defect are shown by AgBr crystals: (i) Sc...

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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 hexagonal clos...

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  11. In which of the following structures coordination number for cations a...

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  12. What is the coordination number in a square close-packed structure 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 given 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 efficiency in different types of unit...

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  19. Which of the following defects is also known as dislocation defect-

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  20. In the cubic close packing, the unit cell has-

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