Double displacement Reaction

Explanation

(i) The reaction in which the place of the ion of a less reactive element in a compound is taken by another more reactive element by formation of its own ions, is called displacement reaction.
(ii) `{:(Zn_((s))+CuSO_(4(aq))toZnSO_(4(aq))+Cu_((s))),("Zinc" " ""Copper" " ""Zinc" " ""Copper" ),(" ""sulphate" " ""sulphate"):}`
(iii) In the above equation when zinc dust is added to blue coloured copper sulphate solution, a colourless solution of zinc sulphate is formed and copper is deposited on zinc.
(iv) The `Zn^(2+)` ions formed from Zn atom take the place of `Cu^(2+)` ions in copper sulphate, and Cu atoms formed from `Cu^(2+)` ion come out. It means that Zn displaces Cu feom `CuSO_(4).