AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
(C) Magnetite
Magnetite is the finest iron ore with a very high iron content of up to 70 per cent and has excellent magnetic qualities.
The passage from Chapter 5 directly states: "Magnetite is the finest iron ore with a very high content of iron up to 70 per cent. It has excellent magnetic qualities." Hematite, though more commonly used industrially, has a lower iron content (50–60%). Remember this distinction — examiners often pair Magnetite vs Hematite as a comparison point.