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1. Which of the following ore is not of iron
a)
Haematite Fe
2
O
3
b)
Magnetite Fe
3
O
4
c)
Limonite Fe
2
O
3
.3H
2
O
d)
Siderite FeCO
3
.
e)
Iron Pyrite FeS
2
.
f)
Bauxite.