Which of the folowings statements are not true ?

1.	Which of the folowings statements are not true ?
Answer» Vacancy defect results in a decrease in the DENSITY of the substance. Intersitital defect results 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. Solution :© is not true because impurity defect CHANGES the mass but not the VOLUME. (d) is not true because Frenkel defect neither changes mass nor volume.

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