Question

What is a colloidal solution ? give two example of gel foam and emulsion​

Answer 1

Foam: Mixtures are called foam when liquid is present as dispersing medium and gas is dispersed medium. For example – shaving cream, soap bubbles, etc. Emulsion: Colloidal solution is called emulsion, when dispersing medium and dispersed phase both are liquid. For example – milk, butter, face cream, etc.

Answer 2

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The ions aggregate to form small particles that remain suspended in the liquid. A stable hydrophobic colloid can be made to coagulate by introducing ions into the dispersing medium.

Fog is an aerosol, whipped cream is a foam, mayonnaise is an emulsion, solid silver chloride dispersed in water is a sol, and fruit jelly is a gel.