What is the difference between displacement and double displacement reactions ? Write equations for these reactions.

Explanation

In a displacement reaction, a more reactive element replaces a less reactive element from a compound
E.g `CuSO_4(aq)+Zn(s)toZnSO_4(aq)+Cu(s)`
In a double displacement reaction, atoms two atoms or a group of switch places to form new compounds.
E.g : `Na_2SO_4(aq)+BaCl_2(aq)toBaSO_4(s)+2NaCl(aq)`