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Assertion : Pure $\mathrm{N}_2$ is obtained from $\mathrm{Ba}\left(\mathrm{N}_3\right)_2$ but not from $\left(\mathrm{NH}_4\right)_2 \mathrm{Cr}_2 \mathrm{O}_7$.
Reason : On decomposition, $\left(\mathrm{NH}_4\right)_2 \mathrm{Cr}_2 \mathrm{O}_7$ gives $\mathrm{O}_2$ gas.
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Reason : On decomposition, $\left(\mathrm{NH}_4\right)_2 \mathrm{Cr}_2 \mathrm{O}_7$ gives $\mathrm{O}_2$ gas.
Solution:
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Verified Answer
The correct answer is:
If assertion is true but reason is false.
$\left(\mathrm{NH}_4\right)_2 \mathrm{Cr}_2 \mathrm{O}_7 \stackrel{\Delta}{\longrightarrow} \mathrm{N}_2+\mathrm{Cr}_2 \mathrm{O}_3+4 \mathrm{H}_2 \mathrm{O}$
$\mathrm{Ba}\left(\mathrm{N}_3\right)_2 \stackrel{\Delta}{\longrightarrow} \mathrm{Ba}+\underset{\text { (pure) }}{3 \mathrm{~N}_2}$
$\mathrm{Ba}\left(\mathrm{N}_3\right)_2 \stackrel{\Delta}{\longrightarrow} \mathrm{Ba}+\underset{\text { (pure) }}{3 \mathrm{~N}_2}$
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