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प्रश्न
Which of the following point defects are shown by AgBr(s) crystals?
- Schottky defect
- Frenkel defect
- Metal excess defect
- Metal deficiency defect
विकल्प
A and B
C and D
A and C
B and D
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उत्तर
A and B
Explanation:
AgBr shows both Schottky and Frenkel defects.
In AgBr, both Ag+ and Br ions are absent from the lattice causing Schottky defect. However, Ag+ ions are mobile so they have a tendency to move aside the lattice and trapped in interstitial site, hence causing Frenkel defect.
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संबंधित प्रश्न
Explain the following term with a suitable example:
Interstitials
Give reasons : In stoichiometric defects, NaCl exhibits Schottky defect and not Frenkel defect.
Out of NaCl and AgCl, which one shows Frenkel defect and why?
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Defects in solids can be studied using
Point defect is also known as ____________.
Frenkel defects are not found in alkali metal halides because ____________.
Which is not correct about the Schottky defects?
Which of the following crystals does not exhibit Frenkel defect?
In a Schottky defect ____________.
Schottky defect is observed in crystals when ______.
Which of the following defects is also known as dislocation defect?
Frenkel defect is also known as:
(i) stoichiometric defect
(ii) dislocation defect
(iii) impurity defect
(iv) non-stoichiometric defect
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Match the defects given in Column I with the statements in given Column II.
| Column I | Column II |
| (i) Simple vacancy defect | (a) shown by non-ionic solids and increases density of the solid. |
| (ii) Simple interstitial defect | (b) shown by ionic solids and decreases density of the solid. |
| (iii) Frenkel defect | (c) shown by non ionic solids and density of the solid decreases. |
| (iv) Schottky defect | (d) shown by ionic solids and density of the solid remains the same. |
If NaCl is doped with 10–4 mole percent of SrCl2 the concentration of cation vacancies will be
