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Chemistry Surface Chemistry JEE Main 2019 Single Correct MCQ
Published on: August 12, 2026

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.

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The correct answer is:
C

Due to the association of solute molecule till they acquire colloidal dimensions, the osmotic pressure of a colloidal solution is of lower order than that of true solution at the same concentration.

(vanthoff factor) is less in colloidal solution than true solution. So, (osmotic pressures) will also be less in colloidal solution.

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