# The average particle mass in colloidal solutions can be determined by

(a) elevation in boiling point
(b) elevation in freezing point
(c) relative lowering in vapour pressure
(d) osmotic pressure

Toolbox:
• The only measurable colligative property of colloidal solution is osmotic pressure.
The only measurable colligative property of colloidal solution is osmotic pressure. This is due to very large particle mass.