A non-metal A which is the largest constituent of air, when heated with H2 in 1:3 ratio in the presence of a catalyst (Fe) gives a gas B. On heating with O2 it gives an oxide C. If this oxide is passed into water in the presence of air, it gives an acid D which acts as a strong oxidising agent. (a) Identify A, B, C and D (b) To which group of periodic table does this non-metal belong?
(a) Identification of A, B, C, and D
(i) A- Non-metal A is Nitrogen (N) because Nitrogen gas (N2) comprises 78 % of the air and is the largest constituent of air.
(ii) B- Gas B is Ammonia (NH3). It is formed when Nitrogen reacts with Hydrogen (H) in the ratio 1:3 in the presence of a catalyst called Iron (Fe)
(iii) C is Nitrogen dioxide (NO2)
(iv) D is Nitric acid (HNO3) which acts as an oxidizing agent.
(b) Group of the non-metal A in the periodic table