Cohesion
Adhesion
In other words addition is the force of attraction between molecules of liquid and another body with which it comes in contact.
When a liquid like mercury is spilled on a smooth horizontal surface, it gathers into droplets because of the force of Cohesion is more than the adhesive force. But when water is poured on a horizontal surface it spreads out and with the horizontal surface because adhesive force is greater than the Cohesive force.
Very useful
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