Write the general equation for combustion of ammonia
NH3 (g) + O2 (g) → N2O (g) + H2O (g)
NH3 (g) +O2 (g) → N2 (g) + H2O (g)
NH3 (g) + O2 (g) → NO (g) + H2O (g)
NH3 (g)+O2 (g)→ NO2 (g)+H2O (g)