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a. NaCl does not exhibit Frenkel. Defect...

a. NaCl does not exhibit Frenkel. Defect. Do you agree? Justify. b: Assume that a fresh piece of KCl crystal is heated in an atmosphere of potassium " vapours. Is there any. C0lour change? Substantiate your answer.

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a. The C0ordination number in .NaCl. is high. . The size of the two.ions .(Na^+ Cl^-). are almost same, So Na" ions cannot be acC0mmodated in the anionic intersticies. b. Yés.. Crystal develops violet C0lour due to the formation of F-centres.
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