Question

11 - 12. what is the difference between cohesion and adhesion? give an example of each.

Explanation:

Cohesion is the attraction between molecules of the same substance. For example, water molecules sticking to each other (surface tension of water). Adhesion is the attraction between molecules of different substances. For example, water molecules sticking to the walls of a glass (meniscus formation in a glass of water).

Answer:

Cohesion: attraction between same - substance molecules (e.g., water - water). Adhesion: attraction between different - substance molecules (e.g., water - glass).