alleryWhich of the following is NOT a colligative property?
AElevation of boiling point
BRelative lowering of vapour pressure
CDepression of freezing point
DRefractive index
Answer & Solution
Correct answer: D. Refractive index
Colligative properties depend on **number, not nature, of solute particles**: vapour-pressure lowering, freezing-point depression, boiling-point elevation, osmotic pressure.
Refractive index is not colligative.
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