Reaction of ammonia with nitrous acid results in production of N2 gas.
Thermal decomposition of ammonium dichromate results into N2 production. (NH4)2Cr2O7⟶Cr2O3+4H2O+N2 Treating aqueous solution of ammonium salt with nitrite results into N2 production. NH4++NO2−⟶N2+2H2O Reaction of ammonia with sodiumhypochlorite is a oxidation reduction reaction in which NaOCl acts as oxidising agent and NH3 acts as reducing agent. It does not results into N2 production. 2NH3+NaOCl⟶NaCl+N2H4+H2O