Question

Colloidal solutions are classified on the basis of :

• A. molecular size
• B. orgainc or inorganic
• C. surface tension value
• D. pH value

Answer 1

The correct option is A molecular size

One criterion for classifying colloids is the physical state of the dispersed phase and dispersion medium. Depending upon the type of the dispersed phase and dispersion medium (solid, liquid, or gas), there can be eight types of colloidal systems. The dispersed-phase particles have a diameter between approximately $1$ and $1000$ nanometers. Homogeneous mixtures with a dispersed phase in this size range are colloidal aerosols, colloidal emulsions, colloidal foams, colloidal dispersions or hydrosols.