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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