Question

what is double displacement reaction

Answer 1

Those reactions in which two compounds react by an exchange of ions to form two new compound are called double displacement reactions. It usually occurs in solution and one of the product, being insoluble, precipitates out (separates as solid).

Examples:-

1. Na2So4 (aq) + BaCl2 (aq) ⇒ BaSO4 (s) + 2NaCl (aq) 

Answer 2

A double displacement reaction, is a type of chemical reaction where two compounds react an the positive ions and negative ions of the two reactants switch places forming two new compounds and products.