Question

21. Describe any three properties of colloid.

Identify the dispersed phase and dispersing medium in the following colloids.
(a) Fog (b) Cheese (c) Coloured gemstone​

Answer 1

Answer:

Properties of a Colloid :-

• A colloid is a heterogeneous mixture.
• The size of particles of a colloid is too small to be individually seen by naked eyes.
• Colloids are big enough to scatter a beam of light passing through it and make its path visible.
• They do not settle down when left undisturbed, that is, a colloid is quite stable.

(a) Fog :

Dispersed phase - Liquid

Dispersing medium - Gas

(b) Cheese :

Dispersed phase - Liquid

Dispersing medium - Solid

(c) Coloured gemstone :

Dispersed phase - Solid

Dispersing medium - Solid

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