You are provided with a mixture containing sand, iron filings, ammonium chloride and sodium chloride. Describe the procedures you would use to separate these constituents from the mixture?

Explanation

Place the mixture on a paper or petridish. Move a bar magnet a number of times over the mixture. Iron filings get attached to the magnet and can be separated later on by scrapping. Transfer the remaining mixture to a china dish and subject it to the sublimation process. Ammonium chloride sublimes leaving behind sodium chloride and sand. Transfer the mixture to a glass beaker. Add a small amount of water and stir with a glass rod for some time. Sodium chloride completely dissolves in water leaving behind sand as such. The latter can be removed by filtration. The filtrate on concentration and cooling gives crystals of sodium chloride.