1. why liquid are more compresible as compared to solid.
2. why are solid regid.
3. which state of matter is highly compresible
4. why it is difficult to change the shape of solid.
A-1) The intermolecular spaces between the particles in liquids are higher than in solids. Thus, particles in liquids are farther as compared to particles in solids,and so can be brought closer by applying high pressure. Thus liquids are more compressible than solids. However, liquids are not so compressible. It is easier to compress gases than liquids.
A-2) The forces of attraction between the constituent particles are maximum in solids, while the inter-particle spaces are minimum. Thus, particles in a solid are packed very tightly. As a result, solid have a definite shape, distinct boundaries and fixed volumes, that is, have negligible compressibility. They tend to maintain their shape when subjected to outside force. Solids may break under force but it is difficult to change their shape, so they are rigid.
A-3) Gases are highly compressible.
A-4) The constituent particles in solids are tightly packed because of which they cannot be compressed. Thus it is difficult to change the shape of a solid.