Because they don't mix.
These substances are called immiscible; for example water and vegetable oil.
Immiscible means incapable of mixing, but you'd (you might) have to ask further incase there is a special solution called 'immiscible solution' of which its inability to mix is only one aspect of it.
Miscible means two substances can mix together , Immiscible means they can't mix together .
Immiscible liquids do not mix with each other and don't form homogeneous mixtures. An example of this type of relationship is between water and oil (they separate)
Oil and water are immiscible substances, as they do not mix together to form a homogeneous solution.
immiscible oil and water copper and cobalt
Miscible and immiscible are you to describe what happens when substances (usually liquids) are mixed together. If 2 layers are formed, like when oil is mixed with water, then the oil would be described as immiscible in water as it does not form a solution. If the two substances mix together and no layers are formed, like when orange squash is mixed with water, the we would say the orange squash is miscible in water as it has formed an orange solution.
No, they are immiscible. I want to improve the answer: Though oil and water are immiscible normally but they can be made immiscible by use of suitable surfactants or better say emulsifying agents resulting in the formation of mixture of oil and water called as emulsion.
Water and olive oil are not miscible.
Examples of immiscible liquids include oil and water, gasoline and water, and vinegar and oil. Immiscible liquids do not mix together to form a homogeneous solution and instead separate into distinct layers.
Yes, because water is polar and oil is non-polar. So they don't mix at the particle level, which is what immiscible means.
The components of an emulsion are liquids normally immiscible.