Filtration can be used to separate a mixture of ____________
sand and water
Explanation for the correct answer
(c) sand and water
In filtration, the sand and water mixture is passed through a filter paper. The water goes through the fine holes in the paper and is collected in a beaker. It is called filtrate. The solid particles are left behind on the filter paper and they form the residue. The residue is collected after drying the paper.
The explanation for the incorrect answer
(a) salt and water
Salt and water are separated by evaporation method either by heating them or by exposing them to the sun. Therefore, filtration cannot be used to separate salt and water.
(b) sulfur and iron filings
Sulfur and iron fillings are separated by the magnetic separation method where the magnet is used to separate magnetic substances.
(d) oil and water
Oil and water can be separated by the separating funnel method where the lighter liquid floats above the heavier liquid.
Therefore, filtration can be used to separate a mixture of sand and water.