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The chemical composition of slag formed during the smelting process in the extraction of copper is:

Correct answer: B. FeSiO3

  • A. Cu2O + FeS
  • B. FeSiO3
  • C. CuFeS2
  • D. Cu2S + Fe

Explanation

Option B is correct. The chemical composition of the slag formed during the smelting process in the extraction of copper is ferrous silicate. Slag is a byproduct of the smelting process. It is a mixture of impurities that are removed from the copper during the smelting process. The composition of the slag varies depending on the type of ore that is being smelted. However, ferrous silicate is a common constituent of slag. Ferrous silicate is a compound of iron and silicon. It is a black, glassy solid that is insoluble in water. Ferrous silicate is a relatively inert compound and it does not react with copper. This is why it is a good slag.

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