The shape of colloidal particles is

Which experimental method and instrument are used to measure the colloidal properties of a polymer solution?

Identify the dispersed phase and dispersion medium in fog,respectively.

The protecting power of lyophilic colloidal sol is expressed in terms of

Gelatin is a protective colloid for which of the following?

The Tyndall effect is observed only when the following conditions are satisfied $:$
$1$. The diameter of the dispersed particles is much smaller than the wavelength of the light used.
$2$. The diameter of the dispersed particle is not much smaller than the wavelength of the light used.
$3$. The refractive indices of the dispersed phase and dispersion medium are almost similar in magnitude.
$4$. The refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude.