Water molecules stick to other materials due to its polar nature. This property is called
The correct answer and explanation is :
The property you’re referring to is called adhesion.
Water molecules exhibit unique properties due to their polar nature. A water molecule has a bent shape, with oxygen being more electronegative than hydrogen, creating partial negative and positive charges on opposite sides of the molecule. This polarity allows water molecules to form hydrogen bonds with other polar or charged surfaces, which leads to the phenomenon of adhesion.
Adhesion is the attraction between water molecules and other substances. This contrasts with cohesion, which is the attraction between water molecules themselves. Together, these properties—cohesion and adhesion—are responsible for many of water’s special characteristics, such as its ability to “climb” up narrow tubes (capillary action) and form water droplets.
For example, when water comes into contact with a glass surface, the water molecules form hydrogen bonds with the glass’s molecules. This attraction causes the water to cling to the surface, leading to the formation of a thin film of water on the surface. Adhesion is especially important in various biological and physical processes, such as:
- Capillary action: In plants, adhesion helps water rise through the narrow xylem vessels. The water molecules adhere to the walls of these tubes, helping to pull water upward, counteracting gravity. This is crucial for the movement of water and nutrients in plants.
- Surface tension: Adhesion contributes to the formation of a “meniscus” when water is placed in a narrow container. Water adheres to the sides of the container, causing the liquid’s surface to curve upward along the edges, which is critical for various scientific measurements.
- Formation of water droplets: Adhesion also plays a role in the formation of water droplets, where water molecules stick to surfaces like leaves or windows.
In summary, adhesion is a result of the polar nature of water molecules and their ability to form hydrogen bonds with other materials. This property is essential in many natural and mechanical processes.