Question

Which method is used to separate kerosene oil, water and salt

Answer 1

kerosene oil and water can be separated by using a separating funnel as they are 2 immiscible liquids
and mixture of water and salt can be separated by crystallization or evaporation
hope this helps

Answer 2

Separating funnel is used to separate   mixture of 2 immisible liquids. Kerosene oil and water do not mix with each other and form 2 separate layers . The mixture separate layers according to their densities.