For immiscible liquids, what is true about their mixing?

• A. They dissolve completely in each other
• B. They react to form a new compound
• C. They form a homogeneous solution automatically
• D. They do not mix or dissolve into each other

Answer: (D)

When two liquids are immiscible, they do not form a single, uniform phase because their molecules prefer to stay with their own kind. Polar water and nonpolar oil, for example, don’t attract each other strongly enough to overcome the attractions within each liquid. That mismatch in intermolecular forces means they resist dissolving into one another, so they separate into distinct layers instead of forming a homogeneous solution. It’s not a chemical reaction and no new compound is created. You can mix them temporarily by stirring, but without an emulsifier, they will separate again.