Ncert Exercises & Solutions

Why is sulphide ore of copper heated in a furnace after mixing with silica?

NEETprep Answer:

Silica (flux) being an acidic flux removes the impurities of iron oxide the basic impurity, by reacting with it. Thus, iron silicate (slag) is formed.

\underset{Gangue}{FeO} + \underset{Flux}{{SiO}_{2}} \to \underset{Slag}{{FeSiO}_{3}}

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