Chemistry - Complete P-block Question with Solution | TestHub

Metal nitrides on heating give pure nitrogen

$\text{Ba}{\left({\mathrm{N}}_3\right)}_2\stackrel{\mathrm{\Delta }}{\to }\text{Ba}+\text{3}{\text{N}}_2$

Ammonium nitrate on heating gives ammonia and not nitrogen

$\mathrm{N}{\mathrm{H}}_4\mathrm{N}{\mathrm{O}}_3\stackrel{\mathrm{\Delta }}{\to }{\mathrm{N}}_2\mathrm{O}+2{\mathrm{H}}_2\mathrm{O}$

${\left(\text{N}{\text{H}}_4\right)}_2\text{C}{\text{r}}_2{\mathrm{O}}_7\stackrel{\mathrm{\Delta }}{\to }\underset{\text{impure}}{{\mathrm{N}}_2}+\mathrm{C}{\mathrm{r}}_2{\mathrm{O}}_3+4{\mathrm{H}}_2\mathrm{O}$