The colloidal system consisting of a liquid dispersed phase in a solid dispersion medium is termed as:

Among the following methods:
$(i)$ Addition of an electrolyte
$(ii)$ Electrophoresis
$(iii)$ Addition of a protective colloid
$(iv)$ Addition of an oppositely charged sol
the coagulation of a lyophobic sol can be carried out by:

Which of the following electrolytes has the maximum coagulating power?

Match the following List-$I$ (Dispersed Phase - Dispersion medium) with List-$II$ (Type of colloid):
| List-$I$ | List-$II$ |
| :--- | :--- |
| $(A)$ Solid - Liquid | $(I)$ Gel |
| $(B)$ Liquid - Liquid | $(II)$ Aerosol |
| $(C)$ Solid - Gas | $(III)$ Sol |
| $(D)$ Liquid - Solid | $(IV)$ Emulsion |

Which is $NOT$ an example of a macromolecular colloid?

Colloidal solution of gold is prepared by .............