Question

Extra pure n2 can be obtained by heating

Answer 1

Solution:

Ba(N3)2−→−−HeatBa(s)+3N2(g)

Azide salt of barium can be obtained in purest form as well as the decomposition product contain solid Ba as by product along with gaseous nitrogen, hence no additional step of separation is required. Other reactions are

NH4NO3−→−−HeatN2O+2H2O

2NH3+3CuO−→−−Heat3Cu+3H2O+N2

(NH4)2Cr2O7−→−−HeatCr2O3+4H2O+N2