which of the following statement are not true ?

Options

A. Vacancy defect results in a decrease in the density of the substance
B. interstitial defects results 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 results I n an increase in the density of the substance

Answer

C,D

Explanation

statements( c) and (D) can be correctty witten as ( c) impurity defect changes the density of substance as impurity has different density than the ion present on perfect crystal .
e.g when `SrCl_(2)` is added to the AN Cl crystal it causes impurity defect
( Frenkel defect result nether secrease decrease nor increase in sensity fo substance .