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

Explanation

Displacement reaction - chemical reaction where a more reactive species displaces a less reactive species from its aqueous solution.
e.g. : `2Al(s)+3CuCl_(2)(aq.)to2AlCl_(3)(aq.)+3Cu(s)`.
Double - displacement reaction - chemical reaction where there is mutual exchange of radicals between the reacting species.
e.g. : `2KBr(aq.)+Bal_(2)(aq.)to2Kl(aq.)+BaBr_(2)(aq.)`.