Q. Which is the wrong statement regarding a crystal containing Schottky defect?
A) Electrical neutrality of the crystal is maintained
B) Entropy of the crystal increases
C) The density of the overall crystal remains the same
D) The density of the overall crystal reduces
Explanation
(c)
When equal number of cations and anions are missing from their position in a crystal lattice so that electrical neutrality is maintained, the defect is called Schottky defect. Due to missing of ions, the overall density of the crystal decreases. Moreover, defect leads to randomness, thus entropy also increases.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.