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

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