Ncert Exercises & Solutions

On heating ammonium dichromate and barium azide separately we get:

1.	$N_{2}$ in both cases
2.	$N_{2}$ with ammonium dichromate and $NO$ with barium azide
3.	$N_{2} O$ with ammonium dichromate and $N_{2}$ with barium azide
4.	$N_{2} O$ with ammonium dichromate and ${NO}_{2}$ with barium azide

Hint: Preparation of nitrogen gas

On heating ammonium dichromate and barium azide it produces

N_{2}

gas separately.

$\begin{gathered} \left(\mathrm{NH}_{4}\right)_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \stackrel{\Delta}{\rightarrow} \mathrm{N}_{2}+4 \mathrm{H}_{2} \mathrm{O}+\mathrm{Cr}_{2} \mathrm{O}_{3} \\ \mathrm{Ba}\left(\mathrm{N}_{3}\right)_{2} \rightarrow \mathrm{Ba}+3 \mathrm{~N}_{2} \end{gathered}$

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