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General Principles and Processes of Isolation of Elements — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryGeneral Principles and Processes of Isolation of Elements1 Mark
MCQ
What will happen during roasting?
  • ✓
    The sulphide ores are converted into oxides.
  • B
    The oxide ores are converted into sulphides.
  • C
    The sulphide ores are converted into carbonates.
  • D
    The oxide ores are converted into carbonates.
✓

Answer

Correct option: A.
The sulphide ores are converted into oxides.
During roasting, the sulphide ores are converted into oxides by heating strongly in excess of air.
$\mathrm{ZnS}+3 \mathrm{O}_2 \rightarrow 2 \mathrm{ZnO}+2 \mathrm{SO}_2$​

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