It makes steel strong, removes impurities and makes it immune to rusting

1. Copper
2. manganese
3. mica
4. uranium

The largest producer of manganese in the world is

1. USA
2. South Africa
3. Russia
4. Germany

A radioactive material used in nuclear defence system and nuclear generation of electricity

1. limestone
2. coal
3. uranium
4. mica

Mexico is the largest producer of which mineral?

1. Silver
2. Gold
3. mica
4. copper