Question

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

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

Answer 1

The correct option is D

Osmotic pressure

As compared to other colligative properties, the magnitude of osmotic pressure is large even for very dilute solutions. Biomolecules are generally not stable at higher temperature and polymers have poor solubility. The osmotic pressure method has an advantage because the pressure measurement is around room temperature