Question

How will you distinguish a colloid from a solution ?

Answer 1

Solution:
i. These are homogeneous mixture of two or more components in which the constituents are not visible to the naked eye.

ii. Particle size of a solution is smaller than 1 nm.

iii. When a beam of light passes through a solution, the path of light is not visible in it. They dont exhibit Tyndall effect.

Colloid:
i. These are the heterogeneous mixtures whose particles do not settle down if left undisturbed.

ii. Particles of colloids are smaller than those of a suspension but larger than a solution. Hence are in the size range of 1-1000 nm.

iii. Colloids also show the Tyndall effect.