Q.

Which of the following statements for crystals having Frenkel defect is not correct?

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a

Frenkel defects are observed where the difference in sizes of cations and anions is large

b

The density of crystals having Frenkel defect is lesser than that of a pure perfect crystal

c

In an ionic crystal having Frenkel defect may also contain Schottky defect

d

Usually alkali halides do not have Frenkel defect

answer is B.

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Detailed Solution

ln frenkal defect ions is shifted in its interstitial site but density remains unchange
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Which of the following statements for crystals having Frenkel defect is not correct?