Which of the following solutions is used in the styptic action which prevents bleeding of blood?

The colloidal solution of $Fe(OH)_3$ in water is a .......

Lyophilic sols are:

$A$ 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:

Smoke is a colloidal dispersion of :-

$A$ negatively charged suspension of clay in water will need for precipitation the minimum amount of