Advertisements
Advertisements
Question
Explain the following term with a suitable example:
Interstitials
Advertisements
Solution
- When certain constituent particles, such as atoms or molecules, occupy interstitial positions, we refer to a crystal as having an interstitial defect.
- As shown in the figure, the presence of interstitial particles increases the substance’s density.
- Non-ionic solids exhibit interstitial flaws and vacancies.
- Ionic solids do not have simple vacancies or interstitial flaws as previously described because they must always maintain electrical neutrality.
- Rather, they display additional flaws referred to as Frenkel and Schottky faults.
- An example of interstitials is Carbon in Iron (Steel); Carbon atoms occupy interstitial sites in the iron lattice, making the metal stronger and harder.
RELATED QUESTIONS
Explain the following term with suitable examples:
Frenkel defect
What type of defect is shown by NaCl in
stoichiometric defects, and
Answer the following question.
What type of stoichiometric defect is shown by ZnS and why?
Frenkel defects are not found in alkali metal halides because ____________.
Type of stoichiometric defect shown by ZnS is ____________.
Which is not correct about the Schottky defects?
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.
Alkali halids do not show Frenkel defect because ____________.
Which of the following crystals does not exhibit Frenkel defect?
In a Schottky defect ____________.
Which of the following point defects are shown by AgBr(s) crystals?
- Schottky defect
- Frenkel defect
- Metal excess defect
- Metal deficiency 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
Which of the following defects decrease the density?
(i) Interstitial defect
(ii) Vacancy defect
(iii) Frankel defect
(iv) Schottky defect
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 ______
The incorrect statement about the imperfections in solids is ______.
