Q. Which one of the following defects in the crystals lowers its density?
A) Frenkel defect
B) Schottky defect
C) F-centres
D) Interstitial defect
Explanation
(b)
Schottky defects - This defect is due to vacancy at a cation site accompanied by vacancy at an anion site so that the electrical neutrality of the system is maintained. Due to this defect, density decreases.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.