Which reaction(s) among the following produce dinitrogen?
Which reaction(s) among the following produce dinitrogen?
1 and 3
2 and 3
3 and 4
2 and 4
Solution
Barium azide $\left[\mathrm{Ba}\left(\mathrm{N}_3ight)_2ight]$ on heating gives $\mathrm{Ba}$ and $\mathrm{N}_2$. This reaction is a source of pure nitrogen.
$\mathrm{Ba}\left(\mathrm{N}_3ight)_2 \stackrel{\Delta}{\longrightarrow} \mathrm{Ba}+3 \mathrm{~N}_2$
Ammonium chloride on reaction with calcium hydroxide gives nitrogen as follows
$\mathrm{NH}_4 \mathrm{Cl}+\mathrm{NaNO}_2 \longrightarrow \mathrm{N}_2+2 \mathrm{H}_2 \mathrm{O}+\mathrm{NaCl}$
Both reactions are used for preparation of nitrogen.
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