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प्रश्न
Which of the following defects decrease the density?
(i) Interstitial defect
(ii) Vacancy defect
(iii) Frankel defect
(iv) Schottky defect
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उत्तर
(ii) Vacancy defect
(iv) Schottky defect
Explanation:
Vacancy and Schottky defect which lead to decrease the density both are the types of a stoichiometric defect. In case of Frenkel defect and interstitial defect, there is no change in density of substance.
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संबंधित प्रश्न
Explain the following term with a suitable example:
Interstitials
What type of defect is shown by NaCl in
stoichiometric defects, and
Defect shown by non-ionic solids is ____________.
Defects in solids can be studied using
The radius of Cs+ is 169 pm and Cl− is 181 pm. The radius ratio is ____________.
Type of stoichiometric defect shown by ZnS is ____________.
Type of stoichiometric defect shown by AgBr is ____________.
The following diagram shows:
Schottky defect defines imperfection in the lattice structure of ____________.
Assertion: Due to Frenkel defect, there is no effect on the density of the crystalline solid.
Reason: In Frenkel defect, no cation or anion leaves the crystal.
Silver halides generally show:
What is the effect of Frenkel defect on the density of ionic solids?
Cations are present in the interstitial sites in ______.
Schottky defect is observed in crystals when ______.
Which of the following statements are not true?
(i) Vacancy defect results in a decrease in the density of the substance.
(ii) Interstitial defects results in an increase in the density of the substance.
(iii) Impurity defect has no effect on the density of the substance.
(iv) Frankel defect results in an increase in the density of the substance.
Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion: In any ionic solid (MX) with Schottky defects, the number of positive and negative ions are same.
Reason: Equal number of cation and anion vacancies are present.
Schottky defect is noticed in ______
Given below are two statements:
Statements I: Frenkel defects are vacancy as well as interstitial defects.
Statements II: Frenkel defect leads of colour in ionic solids due to the presence of F-centers.
Choose the most appropriate answer for the statements from the options given below:
The incorrect statement about the imperfections in solids is ______.
