Question

give two examples of double displacement which are also precipitation reaction​

Answer 1

Double displacement reactions generally take place in aqueous solutions in which the ions precipitate and there is an exchange of ions. For example, on mixing a solution of barium chloride with sodium sulphate, a white precipitate of barium sulphate is immediately formed. These reactions are ionic in nature.

Answer 2

Answer:

1. Sodium sulphate + Barium chloride ------------> Barium Sulphate (white previpitate) + Sodium Chloride
2. Lead Nitrate + Potassium Iodide -------------> Lead Iodide (yellow precipitate) + Potassium Nitrate