We all know well that water and oil can never be mixed. Water is actually made of various tiny hydrogen and oxygen molecules, charged positively and negatively respectively and as both charges are there, so it’s obvious that they will attract each other and stick together. Such molecules with positive charge at one end and negative charge at another end are called polar molecules and in such molecules only hydrophilic substances can get mixed. On the other hand, oil is made up of hydrocarbon chains; molecules in oil are also charged but spread out more evenly, so oil is a water fearing substance and non-polar in nature.
On mixing water to oil, water molecules do not find negative charged molecules in oil to connect to its positively charged molecules, so they don’t get mixed with it.
