Which colligative property is preferred for the molar mass determination of macromolecules (i.e.,proteins and polmers)?

Explanation

Osmotic pressure measurement is preferred over all other colligative properties because.
(i) even in dilute solutions, the osmotic pressure values are appreciably high and can be measured accurately.
(ii) osmotic pressure can be measured at room temperature. On the other hand, elevation in boiling point is measured at high temperature where the solute may decompose. The depression in freezing point is measured at low temperatures.