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Introduction to Imperfections in Solids

What is diffe...

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What is difference between interstitial defect and frenkel defect? And how does density of substances increase due to these defects? (Even if density increases at one point doesn't it decrease at another.)

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Which of the following statements are not true?

(a) Vacancy defect results in a decrease in the density of the substance

(b) Interstitial defects result in an increase in the density of the substance

(c) Impurity defect has no effect on the density of the substance

(d) Frenkel defect results in an increase in the density of the substance

Q. What is Frenkel defect? How does it affect density of the solid?

Q. Which of the following statements is/are true ?
i) Density of solid gets increased due to interstitial defects
ii) Frenkel defects do not alter the density of the solid
iii) Non-stoichiometric defects modify the formula of the compound

iv) Non-stoichiometric defects do not alter the density of the solid

Which of the following defects decrase the density ?

(a) Interstitial defect (b) Vacancy defect

(c) Frenkel defect(d) Schottky defect

Q. (i) Frenkel defect create a vacancy defect at its original site and an interstitial defect at its new position.
(ii) Frenkel defect is stoichiometric point defect.
(iii) Frenkel defect is also called dislocation defect.
(iv) Silver halide shows Frenkel defect
Select the correct statements :

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