Question

Explain why solids have fixed shape but liquids and gases do not have fixed shape.

Answer 1

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Because the particles in liquids are very close together (barely further apart than in solids) liquids do not easily compress, so their volume is fixed. Gases can also flow, so occupy the shape of their whole container. They do not have a fixed shape. ... Gases therefore can be compressed or expanded.

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Answer 2

the atoms of solid are in a fixed and certain attraction force. So they are in fixed position in the crystal of solid. But this does not occur in liquid or gases. So it happens. In the gas or liquid there is less attraction force between the atoms of liquid and solid.