For the coagulation of a negative sol,the species below,that has the highest flocculating power is:

Which of the following is an emulsifier?

Bleeding is stopped by the application of ferric chloride. This is because

In each of four separate beakers $(I, II, III, IV)$,$X \ mL$ of $y \ M \ Fe_2O_3 \cdot xH_2O$ colloidal solution is present. Equal volume and equal concentration of $KCl, K_4[Fe(CN)_6], K_3PO_4$ and $K_2SO_4$ were added into $I, II, III$ and $IV$ respectively. The efficiency of precipitation in these beakers follows the order:

At the isoelectric point,the concentration of $H^+$ ions in colloidal particles is such that the particles:

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