Which term refers to two liquids that mix and create an unstable mixture?

The term that refers to two liquids that mix but create an unstable mixture is "emulsified." An emulsion is a type of mixture where two immiscible liquids are combined, often with the help of an emulsifier. In this context, while the two liquids may initially mix, they do not remain blended over time, resulting in separation.

Miscible liquids are those that can mix in any proportion without separating, such as water and alcohol. Immiscible liquids, on the other hand, do not mix at all, like oil and water. Soluble refers to a substance's ability to dissolve in another, typically in a solid-liquid context rather than a liquid-liquid context.

Therefore, "emulsified" is the most accurate term for describing an unstable mixture created by mixing two otherwise immiscible liquids.