Question

A non-metal A which is the largest constituent of air, when heated with H2 in 1:3 ratio in the presence of 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

Answer 1

A is definitely Nitrogen N²
B is Ammonia NH³
C is either Nitrogen Monoxide (NO) or dioxide (NO²)
D is definitely nitric acid (HNO³)