Answer:
ANSWER :
Characteristics of a gas :-
- ↠ Gases neither have a definite shape nor a definite volume
- ↠ Gases have maximum fluidity and least rigidity
- ↠ Gases are highly compressible
- ↠ Gases exert pressure
Gases neither have a definite shape nor a definite volume :
↝ Gases do not have a definite shape but acquire the shape of the vessel in which they are placed.
↝ Gases do not have a different volume.
↝ For example : if a gas is transformed from a smaller vessel to a bigger vessel it fills the bigger vessel.
Gases have maximum fluidity and least rigidity :
↝ Due to large inter partical spaces and weak interparticle forces of attraction gasses have high fluidity and less rigidity.
Gases are highly compressible :
↝ Since inter particle spaces in the gaseous state are very large they can be decreased by applying pressure.
Gases exert pressure
↝ The particles of gasses are moving continuously in different direction with different speeds.
↝ Due to this random motion the particles of a gas collide with each other and also with the wall of the containing vessel.
↝ Due to this collision, the particles of the gas exert a force on the walls of the container.
↝ This force per unit area exerted by the particles of the gas on the walls of a container is called the pressure of the gas.
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