APPLICATION OF SURFACE TENSION

Explanation

Applications are:
(i) Mosquitoes lay their eggs on the surface of water. To reduce the surface tension of water, a small amount of oil is poured. This breaks the elastic film of water surface and eggs are killed by drowing.
(ii) Chemical engineers must finely adjust the surface tension of the liquid, so it forms droplets of designed size and so it adheres to the surface without smearing. This is used in desktop printing, to paint automobiles and decorative items.
(iii) Specks of dirt get removed when detergents are added to hot wate while wasing clothes because tension is reduced.
(iv) A fabric can be made waterproof, by adding suitable waterproof materia (wax) to the fabric. This increases the angle of contact.