Multiple choice Which one of the following is not a colligative property? Osmotic pressure. Elevation of boiling point Freezing point. Depression in freezing point. Reveal answer Fill a bubble to check yourself C Correct answer Explanation Colligative properties depend on the number of solute particles. Osmotic pressure, boiling point elevation, and freezing point depression are colligative; freezing point itself is a physical property, not a colligative property.