The rule that states that the greater the valency of the flocculating ion,the greater is its coagulating power,was proposed by whom?

The difference between a lyophilic and lyophobic colloid is in their

The density of gold is $19 \, g/cm^3$. If $1.9 \times 10^{-4} \, g$ of gold is dispersed in $1 \, L$ of water to form a sol of spherical gold particles of radius $10 \, nm$,find the number of gold particles per $nm^3$ in the sol.

The colloidal solution of gelatin is known as:

Which of the following is a correct statement?

In dialysis,colloidal particles are separated from