What do you observe on the filter paper strip after 2 to 3 hours?

Filtration

Filtration is commonly used to separate heterogeneous mixtures in liquid form. It separates solid particles from the liquid. The diagram shows how a filter holds back bigger solid particles while the liquid passes through.

Bigger solids can be separated from water by passing the mixture through a paper filter or a finely woven cloth. Ancient techniques for purifying water include filtering it through clean, fine sand or fine coal powder.

omg taking this same test i was stuck on the same question i was too lazy to read the book sadly i cant really give you an answer to this question too complex the answer will be in chapter 5 of the cay