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What is the effect of Schottky and Frenkel defects on the density of crystalline solids?


Schottky defect decrease the density solid where as no such defect arise due to frenkel defect.

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Give reasons for the following:
Ionic solids, inspite of being made up of ions, do not conduct electricity.

Give reasons for the following:
Covalent crystals like diamond and silicon carbide are quite hard and difficult to break.

Name the crystal defect which lowers the density of an ionic crystal

What makes the crystal of KCl appear sometimes violet?

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