Question

give reason - a gas fills completely all the space available to it

Answer 1

Explanation:

Gases have a negligible intermolecular force of attraction between the particles of gas. The random motion of particles in all the directions is experience in the vessel. Hence, the gas fills completely the vessel in which it is kept.

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Answer 2

A gas fills completely in all the space that is available due to reason that the attraction force between its particles is minimal.

• Gases have a marginal intermolecular attraction force between their particles.
• The gaseous particles have a low attractive force between them. The particles pass freely inside the vessel in which they are packed.
• The spontaneous movement of the particles in every direction is experienced in the container. Thus, the gas fills completely in the container.