How will you separate iron fillings , ammonium chloride and sand from their mixture ?

Explanation

Place the mixture on a paper or petri-dish. Move a magnet over it. Iron filings get attached to the magnet. Scrap off iron filings from the magnet and collect them separately. Transfer the remaining mixture to a china dish and subject it to the sublimation process. Ammonium chloride forms the sublimate while sand is left as residue in the dish.