Double displacement Reaction ( Metathesis )

                        In double displacement reaction one of the part of reactant is replaced by another part of reactant. The two reactant replaces to forming two new compounds or product. It is also known as double displacement reaction or metathesis reaction.

General Formula :
AB  +  CD     ---->   AD  +  CB  

Example :

AgNO₃   +   NaCl    →   AgCl   +   NaNO₃

AgNO₃   +   HCl     →   AgCl    +   HNO₃

NaOH    +    HCl     →   NaCl    +   H₂O

Li₂SO₄   +  BaCl₂  →   2LiCl    +   BaSO₄

Na₂SO₃ +  2HNO₃  →  2NaNO₃   +   H₂SO₂