. What are double displacement reactions? Give an example.

Best Answer

 Double displacement is a reaction in which compounds exchange their ions, i.e. two atoms or ions displace each other. 

       Ba(NO₃)₂ (aq)  +  (NH4)₂CO₃(aq)  --------  BaCO₃   +   2NH₄NO₃(aq) 

       Barium nitrate         Ammonium                         Barium       Ammonium

       Carbonate                      Carbonate                                         Nitrate