Q. Schottky defects occurs mainly in electrovalent compounds where
A) Positive ions and negative ions are of different size
B) Positive ions and negative ions are of same size
C) Positive ions are small and negative ions are big
D) Positive ions are big and negative ions are small
Explanation
(b)
When equal number of cations or anions are missing from their lattice sites (to maintain electrical neutrality), then the defect is called Schottky defect. The defect is observed in highly ionic compounds which have cations and anions of similar size $e.g.,$ NaCl, KCl etc.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.