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Karnataka Board PUCPUC Science 2nd PUC Class 12

Properties of Colloidal Dispersions

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Estimated time: 5 minutes
Maharashtra State Board: Class 12

Key Points: Properties of Colloidal Dispersions

Property Type Property Description
General Property Nature Heterogeneous system; particles pass slowly through membranes
Kinetic Property Brownian Motion Continuous random zig-zag motion of colloidal particles
Optical Property Tyndall Effect Scattering of light makes path of beam visible

Colour

Depends on wavelength of scattered light
Electrical Property Charge Colloidal particles carry electric charge
Electrophoresis Movement of particles towards oppositely charged electrode
Electro-osmosis Movement of dispersion medium under electric field
Mechanical Property Brownian Motion Particles remain in constant motion
Stability Property Coagulation Precipitation of colloidal particles
Flocculation Value ∝ 1 / Coagulating power

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