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

Explanation

In a displacement reaction, a more reactive element displaces or removes another element from its compound.
For example, zinc being more reactive, displaces copper from its compound.
`Zn(s)+CuSO_(4)(aq)rarrZnSO_(4)(aq)+Cu(s)`
In case of double displacement reactions, two compounds react by exchanging their ions and form two new compounds.
For example, silver nitrate and sodium chloride exchange their ions, `NO_(3)^(-)andCl^(-)` respectively and form two new compounds in the following reaction.
`AgNO_(3)(aq)+NaCl(aq)rarrunderset(("White ppt."))(AgCl(s))+NaNO_(3)(aq)`