Kerosene, coconut oil, mustard oil do not dissolve in water, even on shaking. They separate after sometime forming two different layer. Explain why.

Kerosene, coconut oil, mustard oil do not dissolve in water, even on shaking. They separate after some time forming two different layers as the molecules of water do not intermingle (mix) with the molecules of oil. The space between the molecules of water is not taken by oil, so they are immiscible in water.