To solve this problem, we need to understand the properties of colloidal solutions.$\\$Colloidal solutions exhibit several properties, some of which depend on the charge of the colloidal particles,$\\$while others do not. Let's analyze each option:$\\$• Electrophoresis: This is the movement of colloidal particles under the influence of an electric field.$\\$ It depends on the charge of the particles, as charged particles move towards the electrode of opposite charge.$\\$• Electroosmosis: This is the movement of the dispersion medium under the influence of an electric field,$\\$ when the colloidal particles are prevented from moving. It also depends on the charge of the particles.$\\$• Tyndall effect: This is the scattering of light by colloidal particles. It is a property that is independent$\\$ of the charge on the colloidal particles. The Tyndall effect occurs due to the size of the particles, which$\\$ is comparable to the wavelength of visible light, causing scattering.$\\$• Coagulation: This is the process of settling down of colloidal particles, typically by neutralizing their charge.$\\$ It depends on the charge of the particles, as coagulation often involves the neutralization of charge.$\\$Therefore, the property of a colloidal solution that is independent of the charge on the colloidal particles is$\\$the Tyndall effect. This corresponds to Option 3.$\\$Thus, the correct answer is Option 3: Tyndall effect.