Nitrogen (N₂) 

It is known as foul gas means it not support in combustion.

Preparation

• By Lab method :- In lab it is prepared heating of Ammonium nitrate.

                     NH₄NO₂       N₂ + 3H₂O

         (Ammonium nitrite)

• By heating of Ammonium dichromate :- When such compound is heated then nitrogen is obtained.

            (NH₄)₂ Cr₂O₇     N₂ + Cr₂O₃ + 4H₂O

• By Ammonia :- Pure nitrogen is obtained when ammonia is fast over copper oxide catalyst.

              2NH₃ + 3CuO → N₂ + 3Cu + 3H₂O

• By heating of Barium Azide 

                  Ba(N₃)₂       Ba + 3N₂

             (Barium azide)

Properties of Nitrogen :-

• It is Colourless , Odorless and tasteless gas.
• It neither combust and not support in combustion.
• It is in soluble in water.
• It turns into liquid at -195^oC.
• It is not poisonous in nature but organic can not serve in presence of such gas because it displaces the oxygen so such gas is known as death gas.

Chemical Properties of Nitrogen :-

• It is present in nature due to presence of triple bond between Nitrogen atom.
• Reaction atom with oxygen :- It react in oxygen at very high temperature and form Nitric Oxide.

            N₂ + O₂       2NO (Nitric oxide)

• Reaction with Hydrogen :- Nitrogen react with hydrogen in presence of iron , Aluminium catalyst high pressure and temperature ammonia is obtained.

                 N₂ + 3H₂    Fe/ Al    2NH₃

                                      (High P & T)

• Reaction with metal :- Reactive metal react with Nitrogen to form their Nitrite.

           6Li + N₂   2Li₃N

           6Mg + 2N₂  2Mg₃N₂(Magnesium nitrite)

          6Ca + 2N₂  2Ca₃N₂

• Reaction with non-metal :- Non-metal or metalloid react with Nitrogen to form their Nitrite.

           2B + N₂ → 2BN (Boron nitrite)

          6S + 2N₂ → 2S₃N₂ (Sulpher nitrite)

• Reaction with calcium carbide :- Calcium carbide react with nitrogen to form Calcium cyanide it is also called Nitrolium.

          CaC₂ + N₂ → CaCN₂ + C (Calcium cyanide)

        Uses of Nitrogen :-

• It is used in a chemical Reaction for giving inert condition.
• It is used for making ammonia.
• It is used as antioxidant.

       Nitrogen FAQ.

Q. Which gas is called Foul gas ?

Ans-Nitrogen gas

Q. Why nitrogen gas is inert in nature?

Ans- It is present inert in nature due to presence of triple bond between nitrogen atom.

Q. When barium azide is heated then which gas is obtain?

Ans-Nitrogen gas

Q. When nitrogen react with reactive metal then which gas is obtain?

Ans:- Metal react with Nitrogen to form their Nitrite.

Q. When nitrogen react with Non- metal then which gas is obtain?

Ans:- Non-metal react with Nitrogen to form their Nitrite.