Which one of the following is a non-ferrous metallic mineral?
- AManganese
- BNickel
- CCobalt
- DTin
- ENone of the above/More than one of the above
Show answer and explanation
Correct answer: (d) Tin
Explanation
Ferrous minerals contain iron, or metals used mainly with iron in steel-making. NCERT lists iron ore, manganese, nickel and cobalt among them.
Non-ferrous minerals contain no iron: copper, lead, zinc, bauxite and tin. So of the options, only tin is non-ferrous.
Some answer keys give (e), counting cobalt as non-ferrous; NCERT lists cobalt and nickel with the ferrous minerals, which leaves tin.