Question

A gas fills completely the vessels in which it is kept ?


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Answer 1

Answer:

A gas completely fills the vessel in which it is kept because there is negligible force of attraction between the particles of gas. Thus, the gas particles move freely in all directions. ... These collisions of the gas particles with the walls of the container exert pressure on the walls of the container.

Answer 2

Answer:

this is due to weaker attraction force between their molecules.