Explain the following terms with examples.

Displacement reaction

Displacement reaction: The reaction in which the ion of a more reactive element displaces the ion of a less reactive metal by forming its own ions. Such reaction is called displacement reaction.

In short, displacement reaction is a reaction in which a more reactive element displaces the less reactive element to form its new compound.

For example: CuSO₄ + Zn → ZnSO₄ + Cu

In the reaction, Zn²⁺ ions formed from Zn atoms take the place of Cu²⁺ ions in copper sulphate (zinc is more reactive).

It means that Zn displaces Cu from CuSO₄.