Give reason: “Gases have no fixed boundaries”.
Step-1:
Gases:
Gases have neither a fixed shape nor a fixed volume.
Example of Gases :
Air, oxygen, carbon dioxide, and steam
Step-2:
“Gases have no fixed boundaries”:
Gases have no fixed boundaries. This is because the spaces between the particles in the gas are not fixed and so the particles are free to move and hence, take the shape of the container it is present.
Step-3:
The figure of the arrangement of gaseous particles: