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ARRANGE THE FOLLOWING SUBSTANCES IN THE INCRASING ORDER OF FORCE OF ATTRACTION BETWEEN THIER PARTICLES ; OXYGEN ,SALT ,MILK

Oxygen - gas, salt belongs to solid and milk belongs to liquid.

So forces of attraction between the particles for the three phases are,

Solid > liquid > gas

Solids    : Molecules are close together and highly attracted to one another.
Liquids   : Comparatively lesser than solids.
Gases    : Weaker than the above two.

Hence, the order is,
       Salt > Milk > Oxygen