1.  what are the chemical properties of hydrogen?
  2. what are the uses of hydrogen?

Hydrogen shows some chemical properties which are as follow:

  1. -  Reaction with Halogen: Hydrogen forms halogen acid when heated with halogens.

   H2 + X2 2HX

 

  1. -  Reaction with Nitrogen: It forms ammonia with heated with nitrogen in the ration of 1:3 volume at appropriate temperature and pressure in the presence of Iron catalyst.

     N2 + 3H2 → 2NH3
3- Reaction with metals: It forms metal hydride.

     Na + H2 →  2NaH

 

4- Reaction with oxygen: When heated with oxygen directly, water is formed with the liberation of huge amount of energy.

     2H2 + O2  2H2O

5- As a reducing agent: When heated with Metal Salt it reduces it to metallic form.

     Fe2O3 + 3H2 → 2Fe + 3H2O

6- Reaction with unsaturated hydrocarbons: It reacts with unsaturated hydrocarbon and convert it into saturate hydrocarbon.

     CH2=CH2 + H2 → CH3CH3

USES:

  1. -  It is used as fuel in rocket and solvent in gas chromatography
  2. -  It is used to prepared vanaspati ghee from vanaspati oil.
  3. -  It is used in the prepared of important halogen acid like HCl.
  4. -  It is used as reducing agent in metallurgy.
  5. -  It is used in the preparation of methanol.

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