Which option about the double displacement reaction is correct? 1. In this reaction, one element takes place of other element and vice versa. 2. The elements of equation have no relation with the reactivity series.

Which option about the double displacement reaction is correct? 1. In this reaction, one element takes place of other element and vice versa. 2. The elements of equation have no relation with the reactivity series. Correct Answer 1 only

The correct answer is 1 i.e. 1 only.

Double displacement reaction:

• Those reactions in which two compounds react by an exchange of ions to form two new compounds are called double displacement reactions.
• A double displacement reaction usually occurs in solution and one of the products, being insoluble, precipitates out.
• It has to do with the reactivity series. Hence, Statement 2 is NOT correct.
• Precipitation reaction:
  • ​Any reaction in which are insoluble solid is formed that separates from the solution is called a precipitation reaction.
  • The reaction between barium chloride solution and sodium sulfate solution to form barium sulfate precipitate is an example of a precipitation reaction.
    • BaCl2 + CuSO4 → BaSO4 + CuCl2​