Question

Define Foam.

Answer 1

1. Colloidal Solutions: It is a heterogeneous mixture made up of two phases namely, the dispersed phase and the dispersion medium.
2. The dispersed phase refers to the component of colloid that is present in minute amounts.
3. The dispersion media is the medium in which colloidal particles scatter or suspend themselves.
4. Foam: It's a colloid that's made up of gas dispersed in liquid media. Hence gas is dispersed phase and liquid is dispersion medium.
5. Examples: Soap bubbles, beer foam, shaving cream.