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Colligative property - the property which depend upon amount of substance not on the nature of substance. For example sweetness depend on amount of sugar. There are some colligative property given in solution chapter of class 12th.
Relative lowering in vapour pressure.- it means the vapour pressure of solvent decrease with amount of non volatile solvent.Elevation in boiling point- the boiling point of solution increase with increase in the amount of solute.
Depression in freezing point - freezing point of water decrease by adding solute in it.
Osmotic pressure - it is directly proportional to amount of solute.
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