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Identify the type of defect shows in the...

Identify the type of defect shows in the following figure :
What type of substances show this defect ?

Text Solution

Verified by Experts

Schottky defect.
This type of defect is shown by ionic compounds in which
(i) the ions have high coordination number and
(ii) ions (cations and anions) are of almost similar sizes.
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Examine the given defective crystal {:(A^(+), B^(-),A^(+),B^(-),A^(+)),(B^(-), O,B^(-), A^(+),B^(-)),(A^(+),B^(-),A^(+),O,A^(+)),(B^(-),A^(+),B^(-),A^(+),B^(-)):} Answer the following question : (i) What type of stoichiometric defect is shown by the crystal ? (ii) How is the density of the crystal affected by this defect ? (iii) What type of ionic substances show such defect ?

Examiine the given defective crystal (i) What type of stoichiometric defect is shown by the the crystal ? (ii) How is the density of the crystal affected by this defect ? (iii) What type of ionic substance show such defect ?

Types of Defects In Solids

KBr shows which of the following defects ?

MODERN PUBLICATION-SOLID STATE-CONCEPTUAL QUESTIONS 2
  1. What type of stoichiometric defect is shown by NaCl ? Explain.

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  2. Analyses shows that FeO has a non-stoichiometric composition with form...

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  3. Following is the schematic alignment of magnetic moments : Ident...

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  4. Name any one solid in which both Frenkel and Schottky defects occur.

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  5. What is the effect of temperature on the conductivity of metals and se...

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  6. Why is Frenkel defect not found in pure alkali metal halides ?

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  7. What is the effect of Schottky defect on the density of crystal ?

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  8. What is the difference in the semi - conductors obtained by doping sil...

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  9. Identify the type of defect shows in the following figure : What typ...

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  10. What type of semiconductor is obtained when : (i) Ge is doped with ...

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  11. Name the compound that can be added to AgCl so as to produce cation va...

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  12. Which point defect lowers the density of a crystal?

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  13. How does the electrical conductivity of super- conductors vary with te...

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  14. Name the non-stoichiometric point defect responsible for the colour of...

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  15. Give reason : (a) Why is Frenkel defect found in AgCl ? (b) What i...

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  16. Why does ZnO appear golden yellow at high temperature ? Explain.

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  17. The electrical conductivity of a metal decreases with rise in temperat...

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  18. Why does zinc oxide exhibit enhanced electrical conducity on heating ?

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  19. Out of NaCl and AgCl, which one shows Frenkel defect and why ?

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  20. Why LiCl acquires pick colour when heated in Li vapours ?

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