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प्रश्न
Explain with diagram, the vacancy defect.
उत्तर
- During the crystallization of a solid, a particle is missing from its regular site in the crystal lattice.
- The missing particle creates a vacancy in the lattice structure. Thus, some of the lattice sites are vacant because of missing particles as shown in the figure. Such a crystal is said to have a vacancy defect.
- The vacancy defect can also be developed when the substance is heated.
- Due to the absence of particles, the mass of the substance decreases. However, the volume remains unchanged. As a result, the density of the substance decreases.
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संबंधित प्रश्न
What are the consequences of Schottky defect?
What is an impurity defect? What are its types? Explain the formation of vacancies through aliovalent impurity with example.
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When a cation or anion from ionic solid leaves its regular lattice site and moves to occupy an interstitial site, it is called as ____________.
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(I) Frenkel defect: Electrical neutrality of the compound is preserved.
(II) Schottky defect: Density of the substance decreases.
(III) Schottky defect: Combination of vacancy defect and interstitial defect.
(IV) Frenkel defect: Small difference between size of cation and anion.
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When electrons are trapped into the crystal in anion vacancy, the defect is known as ______.
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Explain the interstitial defect.
What is a vacancy defect?
Give the disadvantages of a vacancy defect.
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