Answer: The quantity of solute particles in a solution determines its colloidal qualities, not its chemical composition. Boiling point elevation and freezing point depression are two widely researched colligative features.
Explanation: Sugar is a non-electrolyte solute that does not separate into ions in water (C12H22O11). The amount of dissolved sucrose molecules affect the colloidal characteristics of the substance.
Urea, or CO (NH2)2, is a solute that quickly dissociates into ions in water. Compared to non-electrolytes like sucrose, it adds more particles to the solution, which has a greater impact on the colligative qualities.