An ore of iron that is best in terms of iron content and magnetic properties per NCERT is
A{'text': 'Bauxite', 'label': 'A'}
B{'text': 'Cinnabar', 'label': 'B'}
C{'text': 'Magnetite (Fe₃O₄)', 'label': 'C'}
D{'text': 'Zinc blende', 'label': 'D'}
Answer & Solution
Correct answer: C. {'text': 'Magnetite (Fe₃O₄)', 'label': 'C'}
1. Ores are naturally occurring minerals from which metals can be economically extracted.
2. Bauxite is the ore of aluminium; cinnabar (HgS) is the ore of mercury.
3. Zinc blende (ZnS) is the ore of zinc.
4. Magnetite (Fe₃O₄) is the richest iron ore with excellent magnetic properties.
_Source: NCERT Class 10 Science, Ch 3 "Metals and Non-metals", §3.4 (also Geo §5)_
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