Fog is a colloidal solution of

The charges on the colloidal $CdS$ sol and $TiO_2$ sol are,respectively :

Most suitable salt which can be used for efficient clotting of blood will be :-

To resist the coagulation of $100 \ cc$ gold sol, $1 \ cc$ of $10 \% \ NaCl$ is added to it in the presence of $10^{-4} \ g$ gelatin. The gold number of gelatin is:

Under the influence of an electric field,the particles in a sol migrate towards the cathode. The coagulation of the same sol is studied using $NaCl$,$Na_2SO_4$,and $Na_3PO_4$ solutions. Their coagulating values will be in the order:

$A$ clear solution which is again converted into a colloidal solution,the process is called: