A) Osmotic pressure
B) Optical activity
C) Elevation in boiling point
D) Depression in freezing point
Correct Answer: B
Solution :
Key Idea: The colligative properties depends on number of particles not on nature of particles. (i) Osmotic pressure, elevation in boiling point arid depression in freezing point depends on number of particles so they are colligative property (ii) Optical activity does not depend on number of particles.
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