Which of the following statements are not true?

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

Interstitial defects result in an increase in the density of the substance

Impurity defect has no effect on the density of the substance

Frenkel defect results in an increase in the density of the substance

answer is C, D.

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Detailed Solution

Impurity defect changes the density of substance because some of the impurities disturb the stoichiometry of the solid which affects the density of solids. Frenkel defect has no effect on density of the substance because it does not disturb the stoichiometry of the solid.

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