Question

Define viscosity . Write the factors afecting viscosity?

Answer 1

viscosity is the resistance of a liquid to flow.

factors affecting viscosity are

1) temperature

2)pressure

3) concentration

Answer 2

Viscosity, resistance of a fluid (liquid or gas) to a change in shape, or movement of neighbouring portions relative to one another.Viscosity denotes opposition to flow. The reciprocal of the viscosity is called the fluidity, a measure of the ease of flow.



It is well known that temperature is one of the main factors that affect the viscosity. Viscosity is getting higher as the temperature decreases. For the liquid, pressure has a very small impact on viscosity and for the gas, it has a small (not very small) impact on viscosity. But a size of the impact on the viscosity of the gases increases at high pressures. The size of molecules is also necessary to have a high or low viscous effect. For example, plastics have a high viscosity because they're made by large molecules. Moreover, in the mixtures, a fraction of each phase effects the viscosity.