Which Major Islands and Minerals of the World term is correctly associated with location or primary association: “the principal ore of chromium”, and also with “important for stainless steel and alloy production”?

Correct Answer: Option A — Chromite. Chromite is correct because it is the principal ore of chromium. Chromite is also associated with important for stainless steel and alloy production. A further identifying fact is that Chromite is the principal ore of chromium. Another useful fact is that Chromite is associated with important for stainless steel and alloy production. Why the other options are incorrect: Option B — Pyrolusite: It is an important ore of manganese and is associated with mainly manganese dioxide, MnO2; those are the identifying facts of Pyrolusite. Option C — Gypsum: It is a hydrated calcium sulphate mineral and is associated with used in plaster and cement manufacture; those are the identifying facts of Gypsum. Option D — Mica: It is a sheet silicate mineral group and is associated with valued as an electrical and thermal insulator; those are the identifying facts of Mica. Exam Takeaway: Link Chromite with “the principal ore of chromium” and “important for stainless steel and alloy production” for quick revision.