Which of the following is a principal combination in which copper occurs in nature?

1. Sulphides
2. Oxides
3. Carbonate
4. All of the above.

…………… is a good conductor of electricity, highly malleable and ductile.

1. Copper
2. Iron
3. Bauxite
4. Mica

What is the difference between metallic and non-metallic minerals?

Name the three varieties of iron ore mined in India. Name one state where each is found.