Question

Which of the following is not true about viscosity?

• A. A fluid with a relatively high viscosity may behave like a gas.
• B. Viscosity is the friction between the molecules of fluid
• C. Viscosity is a resistive force
• D. Viscous force acts tangentially to the surface of contact.

Answer 1

The correct option is A

A fluid with a relatively high viscosity may behave like a gas.

Viscosity is the property of a fluid which opposes the relative motion between two surfaces of the fluids that are moving at different velocities. It acts tangentially to the surfaces in contact. A fluid with a relatively high viscosity rather appears to be a solid, not gas.