When a strong beam of light is passed through a colloidal solution,the light will

Which one of the following sols acts as a lyophilic colloid?

An aerosol is a

Dialysis can separate

$Fe(OH)_3$ sol is:

The density of gold is $19 \ g/cm^3$. If $1.9 \times 10^{-4} \ g$ of gold is dispersed in one litre of water to give a sol having spherical gold particles of radius $10 \ nm$,then the number of gold particles per $mm^3$ of the sol will be