AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
Magnetite is the iron ore with the highest iron content (up to 70%). It is found in Karnataka (e.g., Kudremukh mines).
The passage clearly states "Magnetite is the finest iron ore with a very high content of iron up to 70 per cent." For the state, Karnataka is explicitly mentioned (Kudremukh mines, Ballari-Chitradurga belt). Odisha, Jharkhand, or Chhattisgarh are also acceptable as they are major iron ore states, but these produce mainly hematite. Mention magnetite + one valid state for full marks.