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In AgBr crystal the ion lies in the order

Ag+ << Br–  . The AgBr crystal should have the following characteristics

a. Defectless (perfect) crystal

b. Schottky defect only

c. Frenkel defect only

d. Both Schottky and Frenkel defects

Ans. d

Explanation : In AgBr both Schottky and Frenkel defects occur simultaneously.

(6)

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