At 273 K, 10 g glucose (p₁), 10 g urea (p₂) and 10 g sucrose (p₃) are dissolved in 250 mL of water. The order of osmotic pressures (p₁, p₂ and p₃), of above solutions is

Since, equal weight of all electrolytes has been used. Higher the molecular weight, lower the number of moles and lower the magnitude of colligative properties like osmotic pressure. Molecular weight order is sucrose > glucose > urea. Hence, the order of osmotic pressures (p₁, p₂ and p₃) of the above solutions is urea (p₂) > glucose (p₁) > sucrose (p₃).