12th Class Chemistry The Solid State / ठोस प्रावस्था Question Bank Case Based (MCQs) - Solid State

Direction (6 - 9): Point defects are the irregularities from ideal arrangement around a point or an atom in a crystalline substance. In ionic solids. Frenkel defect is shown when the smaller ion is dislocated from its normal site while Schottky defect is basically a vacancy defect. (Source N.C.E.R.T. Book)

The defect shown by ionic compounds as in fig. 'a' and 'b' are called respectively as

A) Schottky, Frenkel

B) Frenkel, Schottky

C) Electronic defects, F-centre

D) None of these.

Correct Answer: B

Solution :

Frenkel defect (Fig. a) and Schottky defect (Fig. b).