Which Major Islands and Minerals of the World term is correctly associated with location or primary association: “the principal ore of aluminium”, and also with “commonly forms by intense weathering in tropical regions”?

Correct Answer: Option A — Bauxite. Bauxite is correct because it is the principal ore of aluminium. Bauxite is also associated with commonly forms by intense weathering in tropical regions. A further identifying fact is that Bauxite is the principal ore of aluminium. Another useful fact is that Bauxite is associated with commonly forms by intense weathering in tropical regions. Why the other options are incorrect: Option B — Hematite: It is an important ore of iron and is associated with an iron oxide with the formula Fe2O3; those are the identifying facts of Hematite. Option C — Chalcopyrite: It is a major ore of copper and is associated with a copper iron sulphide mineral; those are the identifying facts of Chalcopyrite. Option D — Galena: It is the principal ore of lead and is associated with a lead sulphide mineral with formula PbS; those are the identifying facts of Galena. Exam Takeaway: Link Bauxite with “the principal ore of aluminium” and “commonly forms by intense weathering in tropical regions” for quick revision.