Question

Give reason (a) window glass of old building look milky. (b) window glass of old building is thick at bottom (c) Cacl2 will introduced schotlky defect if added to Agcl crystal

Answer 1

Since glass flows at a very low rate it becomes thick at bottom when kept standing for a long time

Answer 2

Glass is an amorphous solids which is

supercooled liquid of high viscosity and hence possess fluidity . due to this property it os thicker at the bottom

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milkiness of the glass is due to the fact that it undergoes heating during the day time and cooling at night that is annealing over number of years as a