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Which of the following statements are not true?
(i) Vacancy defect results in a decrease in the density of the substance.
(ii) Interstitial defects increase the density of the substance.
(iii) Impurity defect does not affect the density of the substance.
(iv) Frankel defect results in an increase in the density of the substance.
Answers (1)
The answer is the option (iii, iv)
Impurity defect involves the replacement of ions by an impurity which may have a different density than the ion present on perfect crystal. Frenkel defect results in neither decrease nor increase in density of substance as it involves only the migration of ions within the crystal.
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