Question

why iron and sulphur on heating show magnetic properties where as these properties are shown when iron and sulphur mixed but not heating​

Answer 1

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Explanation:

Iron sulphide is not attracted towards magnet whereas its element (iron) is attracted towards magnet. This suggests that properties of compound are different to the properties of its constituents. In words, magnetic iron on chemical combination with sulphur, gives non magnetic iron sulphide.