Geography
Which of the following is a principal combination in which copper occurs in nature?
- Sulphides
- Oxides
- Carbonate
- All of the above.
Related Questions
…………… is essential for plant growth and reduction of nitrates in green plants.
- Mica
- Iron
- Manganese
- Copper
……………. is the earliest metal used by man.
- Iron
- Manganese
- Bauxite
- Copper
…………… is a good conductor of electricity, highly malleable and ductile.
- Copper
- Iron
- Bauxite
- Mica
What is a mineral? State two characteristics of minerals.