why do solid liquid and gas differ in the physical state

Dear Student,

The solid ,liquids and gas differ only because of the difference in the energy and strength of intermolecular force of attraction which holds the molecules of a matter.

So, anything is solid just because the intermolecular force of attraction is maximum and energy is minimum so that the molecules are held tightly together and they can not move and remain as solidified, but when energy is provided this bond becomes weaker and so the molecules try to be apart and thus the state comes to liquid and on further increase of energy the intermolecular force has the minimum effect on the state and the molecules become free to move and the state becomes gaseous.

 I think , the reason for the different physical states are clear.

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