Which of the followimg statements is correct?

Options

A. If the mutual affinity between the dispersed phase and dispersion medium is great, the colloidal system is solid to be lyophilic.
B. If the mutual affinity between the dispersed phase and dispersion medium is small, the colloidal system is solid to be lyophilic.
C. In a sol if water is the dispersion medium, the system is termed hydrophobic
D. All of these

Answer

D

Explanation

Depending upon the nature of interaction between the dispersad phase and the disperion colloidal sols are divided into two categories nemely lyophilic solvent attracting and lyophodic solvent repelling if water is hydrophobic
The word lyophilic means liquid-loving colloidal sols directly formd by substances like gum gelatin starch rubber etc. no mixing with a suitable liquid the dispession medium are calliod lyophilic sols
The word lyophodic means liquid hating substances like metaks their sulphides etc when simply mixed with the dispersion medium do not form the colloidal sol their colloidal sols can be prepared only by special methods such sols are called lyophobic sols