GENERAL KNOWLEDGE

Detailed explanation-1: -Related to cohesion is surface tension, a measure of how difficult it is to stretch or break the surface of a liquid. Water has a greater surface tension than all other liquids except mercury.

Detailed explanation-2: -Surface Tension: “The property of the surface of a liquid that allows it to resist an external force, due to the cohesive nature of its molecules."

Detailed explanation-3: -It is difficult to stretch or break the surface of a liquid because of the hydrogen bond. The hydrogen bonds are strong in great numbers, which makes this a strong force. The polar nature of water causes water molecules to attract one another.

Detailed explanation-4: -Surface tension is a manifestation of the presence of the hydrogen bond. Those molecules of water that are at the surface are strongly attracted to the molecules of water below them by their hydrogen bonds.

Detailed explanation-5: -A surfactant, at its most basic, is a substance that is designed to reduce the surface tension of a liquid. For many operations in manufacturing processes, it is necessary for a liquid to spread out and wet a surface.