Question

Column I		Column II
A	F-centers	p	Extra cations present in interstitial sites
B	Metal excess defect	q	Some cations are replaced by one of higher valence
C	Metal deficiency defect	r	Both cations and anions are missing from lattices
D	Schottky defects	s	Electrons trapped in anionic vacancies

• A. A - (p), B - (q), C - (r), D - (s)
• B. A - (s), B - (r), C - (p), D - (q)
• C. A - (r), B - (s), C - (q), D - (p)
• D. A - (s), B - (p), C - (q), D - (r)

Answer 1

Answer: (D)

Correct answer is (d) A - (s), B - (p), C - (q), D - (r)