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Process of heating ore is air to remove sulphur is:A. calcinationB. roastingC. smeltingD. none of these

Answer» Correct Answer - B
Roasting is a process of heating the concentrated ore (generally sulphide ore) strongly in te excess of air or `O_(2)` below its melting point. During roasting impurities of `As,Sb, P` and `S` escape as their volatile oxides.
`S(s) +O_(2) rarr SO_(2)(g)`


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