Viscosity of a liquid due to cohesion of its particles

Introduction:
Viscosity is a measure of a fluid's resistance to flow. It is influenced by the cohesive forces between the particles within the fluid. Cohesion refers to the attraction between particles of the same substance. In the case of liquids, the cohesive forces between the liquid molecules contribute to its viscosity.

Explanation:
The statement "The viscosity of a liquid is due to cohesion of its particles" is correct. Here's an explanation of why:

1. Viscosity:
Viscosity is a property of fluids that determines their resistance to flow. It is a measure of the internal friction within the fluid. Liquids with high viscosity flow slowly, while those with low viscosity flow more easily.

2. Cohesion:
Cohesion refers to the intermolecular forces between the particles of the same substance. In the case of liquids, these forces are responsible for holding the liquid molecules together. Cohesion arises from various intermolecular forces such as hydrogen bonding, Van der Waals forces, and dipole-dipole interactions.

3. Viscosity and Cohesion:
The cohesive forces between the liquid particles play a crucial role in determining a liquid's viscosity. These forces create resistance to the flow of the liquid. The stronger the cohesive forces, the higher the viscosity of the liquid.

4. Intermolecular Interactions:
In liquids, the molecules are in constant motion, and they interact with each other through intermolecular forces. These interactions affect the flow behavior of the liquid. When cohesive forces are strong, the liquid molecules tend to stick together, hindering the flow and resulting in higher viscosity.

5. Temperature and Viscosity:
Temperature also plays a role in determining the viscosity of a liquid. Generally, as the temperature increases, the cohesive forces between the liquid molecules decrease, leading to lower viscosity. This is why most liquids become less viscous as they are heated.

Conclusion:
In summary, the viscosity of a liquid is indeed due to the cohesion of its particles. The cohesive forces between the liquid molecules create resistance to flow, resulting in higher viscosity. Understanding the relationship between cohesion and viscosity is important in various applications, such as designing fluid systems and predicting fluid behavior in different scenarios.