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Which one of the following is a mineral of iron?
A
Magnetite
B
Malachite
C
Cassiterite
D
Pyrolusite
Detailed Solution
Magnetite is $Fe_3O_4$, an ore of iron.
Malachite is $CuCO_3\cdot Cu(OH)_2$ (copper), cassiterite is $SnO_2$ (tin) and pyrolusite is $MnO_2$ (manganese).
Malachite is $CuCO_3\cdot Cu(OH)_2$ (copper), cassiterite is $SnO_2$ (tin) and pyrolusite is $MnO_2$ (manganese).