Question

On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because ________
A) Mercury is a metal B) Density of mercury is greater than that of water C) Cohesion of mercury is greater than its adhesion with glass D) Cohesion of water is greater than its adhesion with glass

Answer 1

Answer:

C) Cohesion of mercury is greater than its adhesion with glass

Explanation:

Mercury remains spherical on a glass plate due to greater cohesive force between mercury molecules than adhesive force between mercury and glass plate