Which among the following is double displacement reaction ?

Explanation

(i) The reactin in which the ions in the reactants are exchanged to form a precipitate are called double displacement reactions.
(ii) `{:(BaSO_(4(aq))K_(2)CrO_(4(aq))toBaCrO_(4(s))+ K_(2)SO_(4(aq))),("Barium" " ""Potassium" " ""Barium" " ""Potassium"),("sulphate" " ""chromate" " ""chromate" " ""sulphate"):}`
(iii) Potassium chromate solution reacts with Barium sulphate solution to form Potassium sulphate solution and a yellow precipitate of Barium chromate `(BaCrO_(4)).`