Question

Viscosity is the property of: This question has multiple correct options.
(A) Liquids
(B) Gases
(C) Solids
(D) All of these

Answer 1

Fluids are the materials that can flow. Viscosity can be defined as the property of fluids like liquids and gases to resist its flow. Viscosity works as resistance in the fluids. Viscosity of any fluid depends upon the temperature and pressure. This happens because of the difference between the intermolecular forces of attraction between the molecules of the materials or substances.

Complete answer:
Viscosity is a property of fluids. It is defined as the property of fluids to resist the flow of particles. We know that viscosity generally depends upon temperature and pressure.
We know that viscosity of the fluids mainly depends upon the intermolecular forces of attraction between the molecules or particles of the substance/material. When the temperature increases, the intermolecular distance between the particles increases and hence, the viscosity of the fluid increases. If the temperature decreases, the intermolecular distance between the particles decreases and hence, the viscosity of the fluid decreases.
Viscosity leads the substance or material to become thick.
Viscosity is not the property of solids. It is only the property of fluids like liquids and gases.
Hence, the correct options are:
(A) Liquids
(B) Gases
Therefore, Option A and B are correct.

Note:
All the states of matter (solids, liquids and gases) have different chemical and physical properties. This happens because all the states of matter have different intermolecular forces of attraction between the molecules. So, solids show resistance properties while fluids show viscous properties.