Home Preparation for National Talent Search Examination (NTSE)/ Olympiad
Chapter : 1. Metals & Non Metals
Action of halogens
5. Action of halogens : Halogens combine with heated iron, forming the halides of iron. For example, chlorine combines with heated iron to form ferric chloride. 2Fe + 3Cl2 → 2FeCl3 6. Action with sulphur : When iron filings are heated with sulphur, iron sulphide is produced. Fe + S → FeS 7. Displacement of less electropositive metal : When an iron piece is dipped into a solution of copper sulphate, copper is displaced from the salt and gets deposited on the surface of iron. This is because copper is less electropositive than iron. Fe + CuSO4 → Cu + FeSO4