The chemical reaction that involves roasting process is :

Question

(1) $Fe_2O_3+3CO \to 2Fe+3CO_2$

(2) $2Al+Fe_2O_3 \to 2Fe+Al_2O_3$

(3) $2ZnS+3O_2 \to 2ZnO+3SO_2$

(4) $FeO+SiO_2 \to FeSiO_3$