Which of the following minerals is formed by the decomposition of rocks, leaving a residual mass of weathered material?

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Coal

Bauxite

Gold

Zinc

answer is B.

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Detailed Solution

Bauxite minerals are formed by the decomposition of rocks, leaving a residual mass of weathered material. The decomposition of rocks forms a residual amount of weathered material that results in the formation of Bauxites. It is a significant ore generated by both physical and chemical weathering and is chemically an oxide of aluminium. Bauxites get formed through the physical weathering of aluminium silicate-rich rocks on the earth's surface. The chemical weathering leads to the formation of bauxite through lateralization. The place where it developed, the climate, the environmental factors, the properties of the soil, etc., affect the quality of the bauxites that result from the weathering process. Bauxite typically has a clay-like texture and comes in many colours, especially pink, white, and red, depending on the presence of iron.

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