KCET · Chemistry · p Block Elements (Group 15, 16, 17 & 18)
Which of the following compound does not give dinitrogen on heating?
- A \(\mathrm{Ba}\left(\mathrm{N}_3\right)_2\)
- B \(\mathrm{NH}_4 \mathrm{NO}_2\)
- C \(\mathrm{NH}_4 \mathrm{NO}_3\)
- D \(\left(\mathrm{NH}_4\right)_2 \mathrm{Cr}_2 \mathrm{O}_7\)
Answer & Solution
Correct Answer
(C) \(\mathrm{NH}_4 \mathrm{NO}_3\)
Step-by-step Solution
Detailed explanation
Among the given compounds, only
ammonium nitrate does not produces \(\mathrm{N}_2\) gas on decomposition.
\(\begin{aligned} & \mathrm{Ba}\left(\mathrm{N}_3\right)_2 \stackrel{\Delta}{\longrightarrow} \mathrm{Ba}+3 \mathrm{~N}_2 \\ & \mathrm{NH}_4 \mathrm{NO}_2 \stackrel{\Delta}{\longrightarrow} \mathrm{N}_2+2 \mathrm{H}_2 \mathrm{O} \\ & \mathrm{NH}_4 \mathrm{NO}_3 \stackrel{\Delta}{\longrightarrow} \mathrm{N}_2 \mathrm{O}+2 \mathrm{H}_2 \mathrm{O} \\ & \left(\mathrm{NH}_4\right)_2 \mathrm{Cr}_2 \mathrm{O}_7 \stackrel{\Delta}{\longrightarrow} \mathrm{Cr}_2 \mathrm{O}_3+\mathrm{N}_2+4 \mathrm{H}_2 \mathrm{O}\end{aligned}\)
ammonium nitrate does not produces \(\mathrm{N}_2\) gas on decomposition.
\(\begin{aligned} & \mathrm{Ba}\left(\mathrm{N}_3\right)_2 \stackrel{\Delta}{\longrightarrow} \mathrm{Ba}+3 \mathrm{~N}_2 \\ & \mathrm{NH}_4 \mathrm{NO}_2 \stackrel{\Delta}{\longrightarrow} \mathrm{N}_2+2 \mathrm{H}_2 \mathrm{O} \\ & \mathrm{NH}_4 \mathrm{NO}_3 \stackrel{\Delta}{\longrightarrow} \mathrm{N}_2 \mathrm{O}+2 \mathrm{H}_2 \mathrm{O} \\ & \left(\mathrm{NH}_4\right)_2 \mathrm{Cr}_2 \mathrm{O}_7 \stackrel{\Delta}{\longrightarrow} \mathrm{Cr}_2 \mathrm{O}_3+\mathrm{N}_2+4 \mathrm{H}_2 \mathrm{O}\end{aligned}\)
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