Question

A gas fills completely the vessel in which it is kept.

Answer 1

Yes, Gas is made of molecules which have nearly no forces of attraction or repulsion between them.So they are in random motion and occupy whatever space they have.

Answer 2

hey mate here's ur ans ↓↓

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A gas fills its container in which it is kept because due to its high kinetic energy and negligible forces of attraction the particles of gas are moving with high speed in all direction.

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hope it helP's u☺☺✌