Give the reason behind the following.
i) The glass window pannels of old buildings are thicker at the bottom than at the top.

Give reason for the following. Windows panes of old bulding become thicker at the bottom than at the top.

Give the reason behind the following. Sharp glass edges are heated for making them smooth.

Give the reason behind the following: Sharp glass edge are heated for making them smooth.

Give reason for the following case: It is easier to swim in sea water than in river water.

Assign reason for the following, i. Phosphorus doped silicon is a semiconductor. ii. Schottky defect lowers the density of a solid. ii. Some of the very old glass object appear slightly milky instead of being transparent.

Give reasons for the following observations. CH_3COOH is weaker than HCOOH

Give reasons for the following:- i. elemental phosphorus does not exist as P_2 molecule ii. Noble gases are known as Inert gases.