Smoke is an example of

Colloidal gold is administered by injection. What behavior does it exhibit?

The reason for the stability of a lyophobic sol is

The number of colloidal systems from the following,which will have 'liquid' as the dispersion medium,is $.........$.
Gem stones,paints,smoke,cheese,milk,hair cream,insecticide sprays,froth,soap lather.

In which of the following does coagulation not occur?

In general,for soaps,the concentration of surfactant at $CMC$ is around $mol \ L^{-1}$.