Final answer:
Immiscible is the term that describes the situation where a liquid will not mix in any proportions with another liquid.
Step-by-step explanation:
The term that describes the situation where a liquid will not mix in any proportions with another liquid is immiscible. Immiscible liquids do not form a homogeneous mixture when combined, and they usually separate into distinct layers. This occurs because the intermolecular forces between the molecules of the two liquids are not compatible. A classic example of immiscible liquids is oil and water, which do not mix together and form distinct layers.
Learn more about Liquid immiscibility