QuestionSolutions / colligative properties
Which one of the following colligative properties can provide the most precise molar mass of peptides?
- (a) Elevation of boiling point
- (b) Depression of freezing point
- (c) Relative lowering of vapour pressure
- (d) Osmotic pressure
Answer: (d) Osmotic pressure
For macromolecules (peptides, proteins, polymers), osmotic pressure gives the largest measurable effect even at low concentration, is measured at room temperature (no denaturation) → most precise molar mass → (d).