Question

what are colloids? write the important properties of colloids (any two)

Answer 1

Colloids-Colloids are heterogeneous mixtures which are small in size and we can't see them with our naked eyes,Colloids doesn't settle down at the bottom,They are smal in size but is big enough scatter light from it.ex.-jelly,butter,paper etc.
Its 2 properties are-
1)Colloids are big enpugh to scatter a beam of light passing through them.
2)They are quite stable.

Answer 2

A colloid or a colloidal solution is a heterogeneous mixture in which one substance is displaced as very fine particles having size in the range of 1 to 100 nm , in a continuous medium for another substances.

They are heterogeneous mixture .

They can pass through filter paper .

They show Tyndall effect.

Example - Fog , cloud , milk etc.