What term best defines a liquid's ability to mix with water?

• A. Viscosity
• B. Solubility
• C. Concentration
• D. Density

Answer: (B)

The term that best defines a liquid's ability to mix with water is solubility. Solubility specifically refers to the extent to which a substance can dissolve in a solvent, which in this case is water. It reflects how well a liquid can integrate into water to form a homogeneous mixture.

When discussing different characteristics of liquids, viscosity refers to a fluid's resistance to flow, concentration relates to the amount of solute present in a given volume of solution, and density measures the mass per unit volume of a substance. These terms describe various physical properties but do not specifically address the ability to mix with water, making solubility the most appropriate term in this context.