1. It combines with metals to form basic oxides:-
2Zn(s) + O(g) → 2ZnO(s)
2. It combines with non-metals to form acidic oxides:-
S(s) + O2(g) → SO2(g)
3. It reacts with organic compounds to form water and carbon (iv) oxide.
CH4(g) + 2O(g) → CO2(g) + 2H2O(L)