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प्रश्न
Explain the following term:
Substitutional impurity defect
उत्तर
Substitutional impurity defect: In this defect, the foreign atoms are found at the lattice sites in place of host atoms. The regular atoms are displaced from their lattice sites by impurity atoms.
For example :
- Solid solutions of metals (alloys): Brass is an alloy of Cu and Zn. In brass, host Cu atoms are replaced by the impurity of Zn atoms. The Zn atoms occupy regular sites of Cu atoms as shown in the figure.
 Brass |
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संबंधित प्रश्न
What is an impurity defect? What are its types? Explain the formation of vacancies through aliovalent impurity with example.
Explain with diagram, the vacancy defect.
How are nonstoichiometric point defects classified? Explain with diagram the metal deficiency defect.
Give the classification of stoichiometric point defects.
What is a substitutional impurity defect?
Explain solid solutions of metals and vacancy through aliovalent cations.
Which of the following is an example of substitutional impurity 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 among the following solids shows Frenkel defect?
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?
Schottky defect in crystals is observed when ____________.
Schottky defect is formed in ionic compounds with ____________.
Write the consequences of Schottky defect with reasons.
Explain metal deficiency defect with examples.
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
What is a crystal defect?
Give the disadvantages of a vacancy defect.
What are point defects?
