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  4. How many of the following are oxide minerals of iron? Haematite, iron pyrites, siderite, magnetite, limonite

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Q. How many of the following are oxide minerals of iron?
Haematite, iron pyrites, siderite, magnetite, limonite

General Principles and Processes of Isolation of Elements

Solution:

Haematite $\left( Fe _{2} O _{3}\right)$, magnetite $\left( Fe _{3} O _{4}\right)$ and limonite $\left(2 Fe _{2} O _{3} .3 H _{2} O \right)$ are oxide minerals. Iron pyrites $\left( FeS _{2}\right)$ is a sulphide mineral and siderite $\left( FeCO _{3}\right)$ is carbonate mineral.