This mineral's ore is found in oxide form. It is used to harden steel. Identify the mineral.
A
Iron
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B
Manganese
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C
Bauxite
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D
Gold
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Solution
The correct option is B Manganese Manganese is predominantly found as oxides in the sedimentary and metamorphic rocks. It is used in making steel as the presence of manganese contributes in increasing its hardness.