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Questions  >>  EAMCET  >>  Chemistry
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The chemical reaction that involves roasting process is :

(1) Fe2O3+3CO2Fe+3CO2

(2) 2Al+Fe2O32Fe+Al2O3

(3) 2ZnS+3O22ZnO+3SO2

(4) FeO+SiO2FeSiO3
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