Question

The force which exists between particles of the same kind of substance called cohesion force.
A. True.
B. False

Answer 1

Hint: Cohesion is a phenomenon related to the surface tension and capillary action which are the essential properties of water.

Complete step by step answer:
Cohesion force is the force of attraction between the same types of molecules or substances. It is the result of van der Waals forces and hydrogen bonding that causes liquids like water, ethanol to withstand separation. In general, both adhesive and cohesive force act on the surface of liquid which is poured into a container or vessel. Suppose the liquid is water then-
A strong cohesive force helps in formation of water droplets on the water surface while adhesion force results in spreading the liquid over the surface.
If the cohesion force is stronger between the molecules of water than the adhesion force between the water molecules and the vessel surface, then the water molecules will be attracted towards each other to form a cluster and settle down in the vessel.
Due to cohesion force surface tension is produced in water molecules which make it possible for the lighter objects like water striders to float in water and not sink.
If adhesion force is stronger than the cohesion force then the water molecules disperse.

Hence the correct option is A.

Note:
Cohesion and adhesion forces may sound similar but they are completely different.
Adhesion force is the force of attraction between two or more different molecules that bond with each other.
It is a result of one of the electrostatic forces which are exerted on different substances.