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प्रश्न
Give the classification of stoichiometric point defects.
उत्तर
The chemical formula of a compound shows fixed ratio of a number of atoms or the number of cations and anions. This fixed ratio is the stoichiometry of the compound.
In stoichiometric defect, the stoichiometry remains unchanged. In other words, the ratio of a number of atoms or number of cations and anions of compound remains the same as represented by its chemical formula.
There are four types of stoichiometric point defects:
- vacancy defect
- self interstitial defect
- Schottky defect and
- Frenkel defect
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संबंधित प्रश्न
What are the consequences of Schottky defect?
Explain with diagram, the vacancy defect.
How are nonstoichiometric point defects classified? Explain with diagram the metal deficiency defect.
What is a substitutional impurity defect?
Explain solid solutions of metals and vacancy through aliovalent cations.
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 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.
AgBr shows which type of defect?
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:
Interstitial impurity defect
Explain Self interstitial defect in elemental solid.
What is a crystal defect?
Explain the interstitial defect.
What is a vacancy defect?
Give the disadvantages of a vacancy defect.
What are point defects?
