Answer :

A = NH4NO2

B = N2


C= NH3


D= HNO3


On heating compound A gives compound B


N2 is a constituent of air


NH4NO2 N2 + 2H2O


When N2 is treated with 3mol of hydrogen in the presence of catalyst gives another gas (c)


N2 + 3H2 2NH3


The gas C is basic in nature due to presence of lone pair on nitrogen atom .


Gas C on further oxidation in moist condition gives compound D (HNO3)


HNO3 is present in acid rain.


4NH3 + 5O24NO + 6H2O


2NO + O22NO2


3NO2 + H2O 2HNO3 + NO


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