GENERAL KNOWLEDGE

Detailed explanation-1: -You can separate a mixture of sand, salt and water by decantation and evaporation.

Detailed explanation-2: -Filtration can separate sand from a combination of sand and salt solution (salt dissolved in water). Sand stays on the filter paper as a residue after filtering. By boiling the filtrate, common salt may now be produced. Boiling causes all of the water to evaporate, leaving just salt remaining.

Detailed explanation-3: -A mixture of water and an insoluble (cannot be dissolved) substance like sand can be separated by filtering. What is a filter? Any substance, as cloth, paper, through which liquid or gas is passed to remove solids. Here, filtering is used to separate sand and water.

Detailed explanation-4: -A mixture of sand and water can be separated by the process of sedimentation and decantation. First, the mixture is allowed to stand undisturbed. The heavier sand will settle down then the clear liquid is transferred to another beaker carefully without disturbing the sediment.

Detailed explanation-5: -A sand and water mixture is run through a filter paper (a filter with very fine pores). Larger sand particles are trapped by the filter paper and separated from the water.