The process in which colloids, when subjected to a $DC$ electric field, move towards an electrode is known as:

The reason for the stability of a lyophobic sol is

On adding a few drops of dilute $HCl$ or $FeCl_3$ to freshly precipitated ferric hydroxide,a red-coloured colloidal solution is obtained. This phenomenon is called:

The gold numbers of gelatin, haemoglobin and sodium acetate are $5 \times 10^{-3}$, $5 \times 10^{-2}$ and $7 \times 10^{-1}$, respectively. The protective actions will be in the order

Identify the incorrect statement.

Some substances behave as electrolytes in dilute solutions and as colloids in their concentrated solutions. Their colloidal forms are said to form