Explain why
Water on a clean glass surface tends to spread out while mercury on the same surface tends to form drops. (Put differently ,water wets glass while mercury does not).

Water wets the surface of a glass, but mercury does not. Why?

The surface tension of mercury is much greater than water why?

Water spreads on a glass surface but it forms beads on a glass surface polished by paraffin-why?

Why does the surface enegy increase on dispersion of a large water drop into smaller droplets?

Explain why inspite of nearly the same electronegativity, oxygen forms hydrogen bonding while chlorine does not.

Why does a hot glass chimney crack when drop of water falls on it?

Let n number of little droplets of water of surface tension S dyn. Cm^-1 , all of the same radius r cm, combine to form a single drop of radius R cm. J is joule's mechanical equivalent of heat. While using CGS system of units answer the following questions. i. The energy released is