Question

The rigidity is maximum for____________
A. Solid
B. Liquid
C. Gas
D. Plasma

Answer 1

We have to know that the physical property of being inability to be forced out of shape and resisting bending is defined as rigidity. When an external force is applied to the materials, there won’t be any change within the shape. This shows that particles are closely packed and therefore the attraction between these particles are very strong, i.e., rigidity is maximum.

Complete step by step answer:
As we know that there are three states of matter: Solid, Liquid and gas.
We need to know that plasma is an ionized gas, referred to as fourth states of matter. The atoms in a gas become heated until the atoms lose all their electrons.
Kinetic particle theory: According to this theory, all matter is made up of tiny particles. These particles possess kinetic energy (K.E.) and are in constant motion.
Solids: Based on kinetic particle theory solids are tightly packed in an orderly manner and are held together by interatomic forces. Solids cannot move freely.
We need to know that the typical location of the atoms during a lattice doesn’t change with time. Since atoms are almost lacking in mobility, their K.E. is negligibly small. It’s this lack of mobility which makes a solid rigid. And solid cannot be easily compressed.
Liquid: From kinetic particle theory liquids are held together by weak forces of attraction and liquids can’t be easily compressible and they have fixed volume. If you take a liquid in a container then liquid takes the shape of the container. Liquids can flow, so liquids have fluidity but do not have rigidity.
Gas: Based on the kinetic theory of particles, gases have a lot of K.E. than solids and liquids. Gases can move freely in all directions. Gases are not held in any fixed position and gases are not rigid.
Plasma: This is like gases, but the atoms are different in plasma. Plasma is made up of positively and negatively charged particles.
From the above information solid is more rigid than other states of matter.

So, the correct answer is Option A.

Note: We must remember that the liquids and gases do not have a maximum rigidity but they have fluidity. Gases are higher fluidity than liquids and easily move throughout the available space. Also liquids and gases have higher kinetic energy than solid. Liquid has higher kinetic energy than solid and gas have very high kinetic energy than liquid. Plasma have extremely high kinetic energy.