Question

Define Double Displacement Reactions / Metathesis reactions. Give an example.

Answer 1

$\textbf{Double Displacement Reaction }$:

In double displacement reaction two compounds exchange their ions to form two new compounds. Such a reaction can be represented as :

XY + AB ----> XB + AY

Where X and A are +ve ions and Y and B are -ve ions.

It is also called matathesis reaction.

BaCl2 + Na2SO4 -----> BaSO4 + 2 NaCl