Question

compare and explain compressibility of air, water, oil and sand​

Answer 1

The compressibility is more if the particles are far apart, that is the intermolecular forces of attraction is less. Because the space is more means they are compressed well.  For the given substances the intermolecular forces of attraction is in the order Air < Water < oil < sand. So the order of compressibility is in the order air > water > oil > sand

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Answer 2

Answer: The compressibility of the particles are more if the particles are far apart. Due to this the gases have high compressibility. Arranged it : Air, oil, sand

Explanation: we can conclude that gases are highly competitive rather than solids and gases