MCQ practice · SSC Chemistry Board questions · Chapter 10: Mineral Resources: Metals and Non-metals
Which is an ore of the element with atomic number 29?
Think it through first, then pick an option.
- a Cinnabar
- b Bauxite
- c Limonite
- d Chalcocite
Answer and explanation
Correct answer: d Chalcocite
Element 29 is copper; chalcocite (Cu₂S) is a copper ore.
Why the other options are wrong
- a Cinnabar: Cinnabar is a mercury ore; element 29 is copper, whose ore is chalcocite.
- b Bauxite: Bauxite is an aluminium ore; the answer is copper's ore chalcocite.
- c Limonite: Limonite is an iron ore; 29 means copper, whose ore is chalcocite.
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