What happens when CO is heated with :
(i) ZnO (ii) `Fe_(2)O_(3)` ?

Explanation

CO is a powerful reducing agent. It reduces the metal oxides into metals.
(i) `ZnO(s) + CO(g) overset(Delta) to Zn(s) + CO_(2)(g)`
(ii) `Fe_(2)O_(3)(s) + 3CO(g) overset(Delta) to 2Fe(s) + 3CO_(2)(g)`