Name the dispersion medium in gel. 

Name the dispersed phase in a sol.

Name the phenomenon/process involved i) mixing of hydrated ferric oxide ( +ve sol) and arsenious sulphide ( -ve sol) ii) An impure sol is purified by removing dissolved particles using suitable membrane iii) Movement of dispersion medium is observed in an electric field.

The example of liquid as dispersion medium in colloidal system is:

In the spectrum of visible light, where is the dispersion maximum ?

The colloidal system in which the disperse phase and dispersion medium are both liquids is known