Among the following, the INCORRECT statement about colloids is :

Options

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

Explanation

To determine the incorrect statement about colloids among the given options, let's analyze each statement step by step.

### Step 1: Analyze the First Statement
**Statement:** "They can scatter light."
- **Explanation:** This statement is correct. Colloids exhibit the Tyndall effect, which is the scattering of light by particles in a colloidal solution. The size of colloidal particles (1 nm to 1000 nm) is appropriate for scattering visible light, which has wavelengths ranging from approximately 400 nm to 700 nm.

### Step 2: Analyze the Second Statement
**Statement:** "The osmotic pressure of a colloidal solution is of higher order than the true solution of the same concentration."
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