authentic Education Channel In this lecture i am going to discuss Diazo Coupling Reactions or Replcament reactions.lecture in Urdu ,Hindi and English. Diazo Coupling Reaction is the 6th Type of Electrophilic aromatic substitutions reactions. in this lecture i cover following contents:- 1) Diazo Coupling Reaction as electrophilic aromatic substitutions reaction. 2) diazobenzne chloride give replacement reactins. 3) Replacement of Nitrogen of Diazobenzene chloride to OH , X, H, NO2,Br, I . 4) Chemistry of sandmeyer reacctions . 6) Maim Reagents that are used in Diazo coupling Reactions areNaNO2 , HCl, H2O and organic comound.first three are the source of HNO2. 7) introduction of Cl group in aromatic compound through sandmeyer reaction in aromatic compound through electrophilic aromatic substitution reactions. 8) introduction of Br group in aromatic compound through sandmeyer reaction in aromatic compound through electrophilic aromatic substitution reactions. 9) introduction of H gr