The stabilisation of a lyophobic colloid is due to

The correct order of coagulating power of the following ions to coagulate the positive sol is
$I. [Fe(CN)_6]^{4-}, II. Cl^{-}, III. SO_4^{2-}$

What type of solutions are formed on dissolving different concentrations of soap in water?

The correct statements about the properties of colloidal solutions are:
$A$. Tyndall effect is used to distinguish between a colloidal solution and a true solution
$B$. Zeta potential is related to movement of colloidal particles
$C$. Brownian motion in colloidal solution is faster if the viscosity of the solution is very high.
$D$. Brownian motion stabilises the sols

Which of the following is true for a $Fe(OH)_3$ sol?

Blue colour of water in sea is due to