Adhesion

Adhesion occurs when one type of molecule is attracted to a different molecule. Water exhibits adhesive properties in the presence of polar surfaces, such as glass or cellulose in plants. For instance, when water is poured into a glass, the positively charged hydrogen molecules of water are more attracted to the negatively charged oxygen molecul...

Adhesion occurs when two different types of molecules are attracted to each other.

For instance, adhesion can be observed when a capillary tube is placed in a beaker filled with water.

The water molecules near the sides of the capillary tube adhere to the wall via hydrogen bonds and resist the downward pull of gravity. This upward ...