When copper pyrites is roasted in excess of air, a mixture of CuO + FeO is formed . FeO is present as impurities . This can be removed as slag during reduction of CuO . The flux added to form slag isA. `SiO_2` which is an acid fluxB. Lime stone which is a basic fluxC. `SiO_2` which is acidic fluxD. CaO which is basic flux.

When copper pyrites is roasted in excess of air, a mixture of CuO + Fe

1.	When copper pyrites is roasted in excess of air, a mixture of CuO + FeO is formed . FeO is present as impurities . This can be removed as slag during reduction of CuO . The flux added to form slag isA. `SiO_2` which is an acid fluxB. Lime stone which is a basic fluxC. `SiO_2` which is acidic fluxD. CaO which is basic flux.
Answer» Correct Answer - A

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