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Which one is a colligative property?

1. boiling point
2. vapour pressure
3. osmotic pressure
4. freezing point

Correct answer: osmotic pressure

Solution

Colligative properties depend only on the number of solute particles, not their identity. Osmotic pressure is a colligative property, unlike boiling point, vapour pressure, or freezing point, which are affected by the nature of the solute.

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