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Question
Cations are present in the interstitial sites in ______.
Options
Frenkel defect
Schottky defect
Vacancy defect
Metal deficiency defect
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Solution
Cations are present in the interstitial sites in frenkel defect.
Explanation:
| Defect | Definition | Type of solid |
Effect of defect on density of substance |
Structure of crystal (with defect) |
| Frenkel Defect or dis- location defect |
A crystal is said to have Frenkel defect if cation is missing from the normal lattice position and is occupying interstitial site. |
Ionic solid |
Remain same |
 Frenkel defect |
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RELATED QUESTIONS
Explain the following term with suitable examples:
Frenkel defect
Give reasons : In stoichiometric defects, NaCl exhibits Schottky defect and not Frenkel defect.
What type of defect is shown by NaCl in
stoichiometric defects, and
Defect shown by non-ionic solids is ____________.
Frenkel defects are not found in alkali metal halides because ____________.
Type of stoichiometric defect shown by ZnS is ____________.
Type of stoichiometric defect shown by AgBr is ____________.
The following diagram shows:
Alkali halids do not show Frenkel defect because ____________.
Silver halides generally show:
In a Schottky defect ____________.
Which of the following defects is also known as dislocation defect?
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.
Frenkel defect is also known as:
(i) stoichiometric defect
(ii) dislocation defect
(iii) impurity defect
(iv) non-stoichiometric defect
Why is FeO (s) not formed in stoichiometric composition?
Match the defects given in Column I with the statements in given Column II.
| Column I | Column II |
| (i) Simple vacancy defect | (a) shown by non-ionic solids and increases density of the solid. |
| (ii) Simple interstitial defect | (b) shown by ionic solids and decreases density of the solid. |
| (iii) Frenkel defect | (c) shown by non ionic solids and density of the solid decreases. |
| (iv) Schottky defect | (d) shown by ionic solids and density of the solid remains the same. |
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.
The incorrect statement about the imperfections in solids is ______.
