Question

What are the difference displacement and double displacement reaction with example .

Answer 1

In displacement reaction, one element from its salt is displaced by a more reactive element e.g. in following example, Cu is displaced by Zn from CuSO4 because Zn is more reactive. In double displacement reaction, exchange of ions takes place between two reactants to form new products.

Answer 2

Displacement reaction means the more reactive metal displaces the less reactive metal.
Example:-
1) Zn + CuSO4 ---> ZnSo4 + Cu
2) Pb + CuCl2 ---> PbCl2 + Cu

Double displacement reaction means exchange of ions.
Example
1) BaCl2 + Na2So4 ---> 2NaCl + BaSo4