Question

The property of an ideal fluid is/are-
1. It has no viscosity
2. It is incompressible
3. It does not have surface tension
4. All of the above

Answer 1

Correct Answer - Option 4 : All of the above

The correct answer is option 4) i.e. All of the above.

CONCEPT:

• The viscosity of a fluid: Viscosity is the resistance in a fluid to flow. The resistance is due to the shear stress within the fluid and between the fluid and the surface on which the fluid is flowing.
• Compressibility of fluid: It is the measure of the change in volume of fluid under applied pressure.
• Surface tension: It is the property of a fluid to resist any external force on its surface, Surface tension is due to cohesive forces between the molecules of the liquid.

EXPLANATION:

• Ideal Fluid: An ideal fluid (also called a perfect fluid) is a fluid that has no viscosity, incompressible, and has zero surface tension. 
• A perfectly ideal fluid does not exist.