Which term refers to mixtures with intermediate particle size between true solutions and suspensions?

The correct term for mixtures with intermediate particle size between true solutions and suspensions is colloidal systems. Colloidal systems consist of particles that are larger than those in true solutions but smaller than those in suspensions, typically ranging from 1 nanometer to 1 micrometer in diameter. These particles remain evenly dispersed throughout the medium and do not settle out over time, which differentiates colloids from suspensions, where larger particles do settle and can be easily separated.

Colloidal systems have unique properties due to their particle sizes, such as the Tyndall effect, where light is scattered by the particles, making them visible. This property is not seen in true solutions where the solute particles are too small to interact with light in this manner.

Understanding colloidal systems is essential in various applications across food science and other fields, as they impact the texture, appearance, shelf-life, and stability of products. Therefore, recognizing colloidal systems as the correct answer helps in comprehending the complexity of mixtures encountered in food service and related practices.