1.

Ionic solids, with Schottky defects, contain in their structure [CBSE PMT 1994]

A.                 Equal number of cation and anion vacancies
B.                 Anion vacancies and interstitial anions
C.                 Cation vacancies only
D.                 Cation vacancies and interstitial cations
Answer» B.                 Anion vacancies and interstitial anions


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