What does the term "cohesion" refer to in chemistry?

Cohesion in chemistry specifically refers to the attractive force between molecules of the same substance. This property is particularly evident in water molecules, which are held together by hydrogen bonds. This strong intermolecular attraction leads to various phenomena, such as surface tension, where the cohesive forces allow water to form droplets and resist external force.

The significance of cohesion extends to biological systems as well; for instance, it plays a critical role in the transport of water in plants through capillary action. The ability of similar molecules to stick together allows for efficient nutrient and water transport upward against gravity, which is vital for plant health and growth.

Other choices highlight different phenomena: the force between unlike substances pertains to adhesion, resistance to flow relates to viscosity, and the ability to dissolve other substances involves solubility. These concepts differ from cohesion, which is specifically about the interaction among like molecules.