Question

define the following terms a. rigidity b. compressibility c. density .compare any two states of matter on the bases of above defined properties

Answer 1

(b) (i) Rigidity : It is the property which helps a substance to retain its shape when force is % applied to it. Solids are rigid while gases, and liquids are not. 

                      

(ii) Compressibility: The particles of matter can be compressed or reduced in volume by applying force or pressure. Gases are highly compressible

Answer 2

RIGIDITY :- The property of solids being stiff and resist towards stress is called rigidity .

COMPRESSIBILITY :- The property of substance that how much volume of a gas can be reduced by the application of force is called compressibility .

DENSITY :- Density is defined as the ratio between mass and volume or mass per unit volume .

RIGIDITY

In Solid :- Rigidity is very high
In Liquid :- Rigidity is lower than solids .

COMPRESSIBILITY

In Solid :- Compressibility is not possible easily .
In Liquid :- Compressibility more than in solids .

DENSITY

In Solid :- Density is high .
In Liquid :- Density is low .