ESE 2020Q72
Q: If a pair of one cation and one anion is missing in an ionic crystal such that those pairs of ions are equal to maintain electrical neutrality, then that pair of vacant sites is called
(a)Schottky imperfection
(b)pair of vacancies
(c)Frenkel defect
(d)point imperfection
Correct Answer: (c)
Detailed explanation coming soon.