Hydrophilic sols are .......

Blood can be purified by .......

Gold number is a measure of

Identify the sequential reactions involved in the Sol-Gel process.

Luminosity observed as a result of scattering of light by particles is observed in

How are colloids classified on the basis of
$(i)$ physical states of components
$(ii)$ nature of dispersed phase and
$(iii)$ interaction between dispersed phase and dispersion medium?