Question

which of the following is the best description of a gaseous substance?its the result of a chemical reaction involving two or more elements.it holds its shape without outside restraint.it has no shape of its own but has a definite volume.it has no definite shape or volume and will expand indefinitely.

Explanation:

• The first option describes a compound, not a gas.
• The second option describes a solid, which maintains its shape.
• The third option describes a liquid, which has a fixed volume but no fixed shape.
• The fourth option matches the defining properties of a gas: it takes the shape and volume of its container, with no fixed shape or volume, and expands indefinitely if not contained.

Answer:

It has no definite shape or volume and will expand indefinitely.