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प्रश्न
Explain with diagram, the vacancy defect.
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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 the Schottky defect in crystals?
What is an impurity defect? What are its types? Explain the formation of vacancies through aliovalent impurity with example.
How are nonstoichiometric point defects classified? Explain with diagram the metal deficiency defect.
When a cation or anion from ionic solid leaves its regular lattice site and moves to occupy an interstitial site, it is called as ____________.
Which of the following match is CORRECT?
(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.
Which among the following statements is true about Schottky defect?
Which of the following pair of ionic crystals show Schottky defect?
Which among the following defects is observed in Brass?
Schottky defect is formed in ionic compounds with ____________.
Write the consequences of Schottky defect with reasons.
Name a compound where Frenkel defect is found.
In which among the following solids, Schottky defect is not observed?
When electrons are trapped into the crystal in anion vacancy, the defect is known as ______.
Explain the following term:
Substitutional impurity defect
Explain the following term:
Interstitial impurity defect
Explain Self interstitial defect in elemental solid.
Explain the interstitial defect.
Give the disadvantages of a vacancy defect.
What are point defects?
Identify the type of defect from following in stainless steel.
