Which statement best describes immiscible liquids when mixed?

Which statement best describes immiscible liquids when mixed?

• A. They form a single homogeneous phase.
• B. They do not dissolve in each other.
• C. They always react to form a new compound.
• D. They are both gases

Answer: (B)

Immiscible liquids do not dissolve in each other, so when they are mixed they separate into two distinct liquid layers instead of forming one uniform solution. This happens because each liquid’s molecules prefer to interact with itself rather than with the other liquid. For example, polar water forms strong hydrogen bonds with itself, while nonpolar oil molecules do not interact favorably with water, so oil doesn’t dissolve in water and water doesn’t dissolve in oil. The result is two layers that settle according to density differences, with the denser liquid usually on the bottom. Emulsions can occur if an emulsifier is present, but without such agents the liquids remain separate. In contrast, forming a single homogeneous phase describes miscible liquids, chemical reaction to make a new compound is not implied by immiscibility, and being both gases is not relevant to the concept.

Immiscible liquids do not dissolve in each other, so when they are mixed they separate into two distinct liquid layers instead of forming one uniform solution. This happens because each liquid’s molecules prefer to interact with itself rather than with the other liquid. For example, polar water forms strong hydrogen bonds with itself, while nonpolar oil molecules do not interact favorably with water, so oil doesn’t dissolve in water and water doesn’t dissolve in oil. The result is two layers that settle according to density differences, with the denser liquid usually on the bottom. Emulsions can occur if an emulsifier is present, but without such agents the liquids remain separate. In contrast, forming a single homogeneous phase describes miscible liquids, chemical reaction to make a new compound is not implied by immiscibility, and being both gases is not relevant to the concept.