Which Major Islands and Minerals of the World term is correctly associated with location or primary association: “an important ore of iron”, and also with “an iron oxide with the formula Fe2O3”?

Correct Answer: Option C — Hematite. Hematite is correct because it is an important ore of iron. Hematite is also associated with an iron oxide with the formula Fe2O3. A further identifying fact is that Hematite is an important ore of iron. Another useful fact is that Hematite is associated with an iron oxide with the formula Fe2O3. Why the other options are incorrect: Option A — 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 B — 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. Option D — Sphalerite: It is the principal ore of zinc and is associated with a zinc sulphide mineral; those are the identifying facts of Sphalerite. Exam Takeaway: Link Hematite with “an important ore of iron” and “an iron oxide with the formula Fe2O3” for quick revision.