Multiple choice Which of the following is/are ore(s) of iron? Orpiment Marcasite Haematite Magnetite 1 and 2 2 and 3 3 and 4 1, 2 and 3 2, 3 and 4 Reveal answer Fill a bubble to check yourself E Correct answer Explanation The ores of iron are- Marcasite or iron pyrite (FeS2): sulphide ore, Haematite (Fe2O3): oxide ore, Magnetite (Fe3O4): oxide ore, Orpiment (As2S3) is the sulphide ore of arsenic.