Sound WavesHard

Question

Which one of the following is a mineral of iron?

Options

A.Malachite

B.Cassiterite

C.Pyrolusite

D.Magnetite

Solution

Mineral                       Chemical composition
Malachite                    CuCO₃Cu ( OH )₂
Cassiterite                   SnO₂
Pyrolusite                   MnO₂
Magnetite                   Fe₃ O₄
Thus, Magnetite is a mineral of iron.

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