Question

what is adhesion and cohesion​

Answer 1

Answer:

Adhesion is the mutual attraction between unlike molecules that causes them to cling to one another. The word can be used in a more general sense to refer to any clinging property (for example, glues and tapes can be called adhesives). The defining feature is that adhesion occurs between two different substances. For example, the adhesion of water molecules to the plastic beaker causes them to cling at a higher level around the edges.

Cohesion is the mutual attraction between like molecules that causes them to stick together. The word can also be used in a more general sense to indicate that something, such as a story or a lecture, remains the same throughout. The defining feature of cohesion is that it occurs between two like substances.

Answer 2

Answer:

Wetting or non-wetting nature of a liquid depends upon two types of forces.

Adhesion --It is between the molecules of a liquid and the solid (whose surface is in contact with the liquid) are known as adhesive forces.

Cohesive -  The inter molecular attractive forces between molecules of a liquid is known as cohesive forces.