Assertion :Colloidal solutions are electrically neutral. Reason: Dispersed phase and dispersion medium are of same charge.
Let's take an example of Fe(OH)3, to make a Fe(OH)3 sol we need to add FeCl3, the Fe(OH)3 sol particles adsorb the Fe3+ ions on their surface.
But the entire solution is electrically neutral. Because for each Fe3+ adsorbed on the sol, there are three free Cl− ions present in the medium.