A non-metal A which is the largest constituent of air, when heated wit

1.	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 the water in the presence of air it gives an acid D which acts as a strong oxidizing agent. (a) Identify A, B, C and D (b) To which group of periodic table does this non-metal belong?
Answer» a) Non-metal a is nitrogen because it is the largest constituent of air which constitute around 78% of the gases. B is Ammonia, C is Nitrogen dioxide D is Nitric acid. When heated with H₂ in 1:3 ratio in the presence of catalyst (Fe) following reaction takes place. 3N₂ + 3H₂ → 2NH₃ On heating Nitrogen with O₂ it gives nitrogen-di-oxide N₂ + 3O → 2NO₂ When nitrogen dioxide is passed into water in the presence of air it gives an Nitric acid NO₂ + H₂O → HNO₃ b) Nitrogen belong to group 15

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 the water in the presence of air it gives an acid D which acts as a strong oxidizing agent. (a) Identify A, B, C and D (b) To which group of periodic table does this non-metal belong?

Answer»

Non-metal a is nitrogen because it is the largest constituent of air which constitute around 78% of the gases.

When heated with H₂ in 1:3 ratio in the presence of catalyst (Fe) following reaction takes place.

3N₂ + 3H₂ → 2NH₃

On heating Nitrogen with O₂ it gives nitrogen-di-oxide

N₂ + 3O → 2NO₂

When nitrogen dioxide is passed into water in the presence of air it gives an Nitric acid

NO₂ + H₂O → HNO₃

b) Nitrogen belong to group 15