Geography
……………. is the earliest metal used by man.
- Iron
- Manganese
- Bauxite
- Copper
Mineral Resources
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Answer
Copper
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Related Questions
An excess of ……………. in plants and animals is toxic.
- iron
- magnetite
- manganese
- haematite
…………… is essential for plant growth and reduction of nitrates in green plants.
- Mica
- Iron
- Manganese
- Copper
Which of the following is a principal combination in which copper occurs in nature?
- Sulphides
- Oxides
- Carbonate
- All of the above.
…………… is a good conductor of electricity, highly malleable and ductile.
- Copper
- Iron
- Bauxite
- Mica