X is an ore that can be easily mined. X is formed when certain mineral rocks are weathered away by natural agents and the soluble constituents are washed away leaving behind a residual mass. Identify X.
A
Platinum
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B
Gold
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C
Bauxite
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D
Coal
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Solution
The correct option is C Bauxite When certain mineral rich rocks get weathered by agents like wind and water, its soluble constituents get washed away leaving behind a residual mass of that weathered material. This residual mass is rich in minerals and is generally near the surface and thus can be easily extracted. Bauxite ore occurs in this way. It is from these bauxite ores that aluminium is extracted.