Qualitative Analysis - Result Question 28
####28. A solution of colourless salt $H$ on boiling with excess $NaOH$ produces a non-flammable gas. The gas evolution ceases after sometime. Upon addition of $Zn$ dust to the same solution, the gas evolution restarts. The colourless salt(s) $H$ is (are)
$(2008,4 M)$
(a) $NH _4 NO _3$
(b) $NH _4 NO _2$
(c) $NH _4 Cl$
(d) $\left(NH _4\right) _2 SO _4$
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Answer:
Correct Answer: 28. (a,b)
Solution:
- $NH _4 NO _3+NaOH \longrightarrow NaNO _3+NH _3+H _2 O$
$NH _4 NO _2+NaOH \longrightarrow NaNO _2+NH _3+H _2 O$
