Question

what is a colloid and what are the examples of colloid?​

Answer 1

A colloid is a substance microscopically dispersed evenly throughout another substance. The dispersed-phase particles have a diameter between about 5 and 200 nanometers.

Examples: Milk is an emulsion, which is a colloid in which both parties are liquids.

Answer 2

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Colloidal Solution - A solution in which the size of the solute particles are intermediate between those in true solution and suspension.

For Example - Milk, Blood, Ink and solution etc.

Properties of Colloidal solution -

A colloid is a heterogeneous mixture but appear as homogeneous.

• They are translucent.

• The particles of colloids are too small to be seen by naked eyes.

• Particle size of colloids are 1-1000 nm.

• Colloids are big enough to scatter a beam of light passing through it and make it's path visible.

• They do not settle down when left undisturbed.

• They cannot be separated by filtration process but can be separated by centrifugation method.