| true solution | colloid. |
1. | A true solution is a homogeneous mixture of two or more substances. | A colloidal solution is a heterogeneous mixture of two substances. |
2. | The size of the particles is less than one nanometer. | The range of particle size is between one nanometer to 1000 nanometer. |
3. | It is always transparent. | It is translucent. |
4. | The particles cannot be seen even with microscope. | The particles of a colloidal solution can be seen with microscope. |
5. | It does not show Tyndall effect. | It shows Tyndall effect. |