Question

Give scientific reasons - Constituent substances of a colloid cannot be separated by ordinary filtration.

Answer 1

As the substances of the colloid solution are very small and can easily pass through filter paper.. this is the reason why we can't separate a colloid solution..

Answer 2

Constituent particles of a colloid have very small size as compare to the pores or holes of filter paper.

This means that filtering any colloid with filter paper will allow the colloid particle to pass through it and thus no residue is left.

Hence, it is not a good idea to filter any colloid with filter paper.