Colloidal solution of arsenious sulphide can be prepared by:

The dispersed phase and dispersion medium of fog respectively are

Which one of the following is used as a disinfectant in water treatment?

Select the correct statement regarding colloidal systems.

$Fe(OH)_3$ sol is prepared by the hydrolysis of $FeCl_3$ in hot water. If the sol is electrolysed using inert electrodes,the only correct statement is -

Mixing of positively charged colloidal solution with negatively charged colloidal solution brings $ . . . . . . $. The decreasing order of coagulating power of $Na^{+}$,$Ba^{2+}$ and $Al^{3+}$ for negatively charged colloidal solution is $ . . . . . . $?