Q.
How many of the following are oxide minerals of iron?
Haematite, iron pyrites, siderite, magnetite, limonite
97
160
General Principles and Processes of Isolation of Elements
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Answer: 3
Solution:
Haematite (Fe2O3), magnetite (Fe3O4) and limonite (2Fe2O3.3H2O) are oxide minerals. Iron pyrites (FeS2) is a sulphide mineral and siderite (FeCO3) is carbonate mineral.