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.)

Explanation

In case of mercury, the force of cohesion between the molecules of mercury is greater than force of adhesion between mercury and glass. In case of water and glass, the force of adhesion between water and glass is more than the force of cohesion between molecules of water surfac