For determination of molar mass of colloids, polymers and protein which colligative property is preferred?

Options

A. Diffusion pressure
B. Atmospheric pressure
C. Osmotic pressure
D. Turgor pressure

Answer

C

Explanation

Osmotic pressure method is preferred over other colligative properties, for molar mass determination of polymers, proteins and other macromolecules because (i) change observed in other properties like boiling point elevation, freezing point depression, etc. are very small while change in osmotic pressure can be easily measured. (ii) biological molecules such as proteins are not stable at very high or low temperature whereas osmotic pressure is measured at room temperature. - MRT}