Question

how i cohesive and adhesive force related to surface tenion

Answer 1

Dear student,

Cohesive force are attractive forces between similar molecules.
Ex- between water-water molecules.

Adhesive force are attractive forces between molecules of different materials.
Ex- water molecule and silica

Your hands get wet when you touch water due to adhesive forces between water and skin.

Surface tension is net effect of cohesive forces in downward direction on any surface.

A water molecule inside a water column experiences equal forces in all direction and net experienced force is zero.
Contrary to this,at water surface, water molecules experiences a net downward force as there is no water media above water surface. This net downward force which arises due to cohesive force of water is called as surface tension.
S.I unit of surface tension is N/m

Now, when temperature of a liquid media is increased , cohesive force between molecules are decreased and hence surface tension will decrease.
Regards