The mixture of water and kerosene is put in separating funnel and allowed to stand for some time. The mixture separates into two layers according to the densities of water and kerosene. Water is heavier than kerosene. So, water forms lower layer while kerosene forms upper layer. On opening the stop clock of separating funnel, the lower layer of water comes out first and collected in beaker leaving behind kerosene.

Separation of kerosene oil and water mixture by separating funnel.