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  4. 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

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Q. 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) $H$

IIT JEEIIT JEE 2008The d-and f-Block Elements

Solution:

$NH_4 NO_3 + NaOH \longrightarrow \, NaNO_3 + NH_3 + H_2 O$
$NH_4 NO_2 + NaOH \longrightarrow \, NaNO_2 + NH_3 + H_2 O$