Which statement describes a property of gases?

Which statement describes a property of gases?

• A. Gases have definite shape and volume.
• B. Gases have neither definite shape nor definite volume.
• C. Gases have a definite volume but take shape of container.
• D. Gases have a definite shape but no volume.

Answer: (B)

Gases don’t have a fixed shape or a fixed size. They spread out to fill whatever space they’re in, taking both the shape and the volume of their container. This is different from solids, which keep a definite shape and volume, and from liquids, which have a definite volume but take the container’s shape. So, the best description is that gases have neither definite shape nor definite volume.

Gases don’t have a fixed shape or a fixed size. They spread out to fill whatever space they’re in, taking both the shape and the volume of their container. This is different from solids, which keep a definite shape and volume, and from liquids, which have a definite volume but take the container’s shape. So, the best description is that gases have neither definite shape nor definite volume.