Which of the following colligative property can provide molar mass of proteins (or polymers or colloids) with greatest precision?

Options

A. Relative lowering of vapour pressure
B. Elevation of boiling point
C. Depression in freezing point
D. Osmotic pressure

Answer

D

Explanation

Osmotic pressure method is especially suitable for the determination of molecular masses of macromolecules such as protein & polymer because for these substances the values of other colligative properties such as elevation in boiling point or depression in freezing point are too small to be measured on the other hand osmotic pressure of such substances is measurable.