Give reasons : (a) Window glass of old building look milky. b) Window glass of old building is thick at bottom. (c) CaCl2 will introduce Schottky defect if added to AgCl crystal.

Give reasons :

(a) Window glass of old building look milky.

b) Window glass of old building is thick at bottom.

(c) CaCl2

 will introduce Schottky defect if added to AgCl crystal.


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1 Answer

Answer :

(a) Due to annealing over a number of years glass acquires some crystalline character.

(b) Glass is not a true solid. But a super-cooled liquid of high viscosity. It has the property to flow.

(c) 2 Ag+ will be replaced by 1 Ca2+ ions to maintain electrical neutrality. Thus a hole is created and lattice site for every Ca2+ ion introduced. 
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