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Question:

Among the following, the INCORRECT statement about colloids is:
A. They can scatter light
B. They are larger than small molecules and have high molar mass
C. The osmotic pressure of a colloidal solution is of higher order than the true solution at the same concentration
D. The range of diameters of colloidal particles is between 1 and 1000 nm

They can scatter light

They are larger than small molecules and have high molar mass

The osmotic pressure of a colloidal solution is of higher order than the true solution at the same concentration

The range of diameters of colloidal particles is between 1 and 1000 nm

Solution:

Correct option is C. The osmotic pressure of a colloidal solution is of a lower order than the true solution at the same concentration. Colligative properties of colloidal solutions are smaller than true solutions at the same concentration. So, C is the incorrect statement.