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.

Correct Answer: cohesion of mercury is greater than its adhesion with glass.

On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because cohesion of mercury is greater than its adhesion with glass.
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