On heating compound (A) gives a gas (B) which is a constituent of air. This gas when treated with 3 moles of hydrogen (`H_2`) in the presence of a catalyst gives another gas (C) which is basic in nature. Gas C on further oxidation in moist condition gives a compound (D) which is a part of acid rain. Identify compounds (A) to (D) and also give necessary equations of all the steps involved.

Explanation

(A): `NH_(4)NO_(2), ` (B) : `N_(2)`
( c) : `NH_(3)`, (D) : `HNO_(3)`
(i) `underset(A)(NH_(4)NO_(2)) overset(Delta)to underset(2H_(2)O)`
(ii) `N_(2)(g) + 3H_(2)(g) overset(Fe)to 2NH_(3)(g)`
(iii) `4NH_(3)(g) + 5O_(2)(g) to 4NO(g) + 6H_(2)O(l)`
(iv) `2NO(g) + O_(2)(g) to 2NO_(2)(g)`
(v) `3NO_(2)(g) + H_(2)O(l) to underset(D)(2HNO_(3)) + NO(g)`