which of the following defects decrase the density decrease the density ?

Options

A. interstitial defect
B. Vacancy defect
C. Frenkel defect
D. Schottky defect

Answer

B,D

Explanation

Vacancy and schottky defects which lead to decrease the density both are the types of a stoichiometric defect in case of frenkel defect and intersititial defect there is no change in density of substance .