Question

SO + O2 = SO2

2. Cr2O3 + C = Cr + CO2

3. Fe2O3 = Fe + O2

4. Na + H2O = NaOH + H2

5. NH3 + O2 = NO + H2O

Answer 1

2SO+O2--->2SO2

2Cr2O3+3C--->4Cr+3CO2

2Fe2O3--->4Fe+3O2

2Na+2H2O--->2NaOH+H2

4NH3+5O2--->4NO+6H2O