Which of the following is a hydrophilic colloidal sol?

Critical Micelle Concentration $(CMC)$ for a soap solution is $1.5 \times 10^{-4} \ mol \ L^{-1}$. Micelle formation is possible only when the concentration of soap solution in $mol \ L^{-1}$ is:

Which of the following statements is incorrect about colloidal solutions?

During electro-osmosis of $Fe(OH)_3$ sol,

Which property of colloids is not dependent on the charge on colloidal particles?

$A$ colloidal solution is subjected to an electrical field. The particles move towards the anode. The coagulation of the same sol is studied using $NaCl$,$BaCl_2$,and $AlCl_3$ solutions. Their coagulating power should be: