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प्रश्न
Explain metal deficiency defect with examples.
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उत्तर
Positive metal ions are missing from their original Lattice locations in some crystals. The existence of a cation of the same metal with a higher oxidation state than the missing cation balances the extra negative charge.
For Example: In NiO one Ni2+ ion is missing, creating a vacancy at its Lattice site. The deficiency of two positive charges is made up by the presence of two Ni3+ ions at the other Lattice sites of Ni2+ ions.
Nonstoichiometric Ni0.97O1.0
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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.
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 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 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.
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.
What is a vacancy defect?
Give the disadvantages of a vacancy defect.
Identify the type of defect from following in stainless steel.
