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Metals and Non-Metals — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMetals and Non-Metals1 Mark
MCQ
A sulphide ore is converted into metal oxide by the process of :
  • A
    Carbonation.
  • ✓
    Roasting.
  • C
    Calcination.
  • D
    Anodising.
✓

Answer

Correct option: B.
Roasting.
Sulphide ores are transformed into oxides by the process of roasting. In this process, concentrated ore is heated in the presence of surplus air.
Example: Zinc blende $,\ce{ZnS},$ a sulphide ore of zinc, is roasted in the presence of air. On roasting​, zinc sulphide gets transformed into zinc oxide.

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