A) Depression in freezing point
B) Osmotic pressure
C) Relative lowering of vapour pressure
D) Elevation of boiling point
Correct Answer: B
Solution :
It is the minimum excess pressure that has to be applied on the solution to prevent the entry of the solvent into the solution through the semi-permeable membrane. \[\operatorname{As} \pi V=nRT\] \[\pi = Osmotic pressure\] Hence for the determination of molecular masses of proteins/polymers, it is considered to be one of the suitable methods as a colligative property.
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