Question

how does a displacement reaction differ from a double displacement reaction? give examples to explain​

Answer 1

Answer:

In a displacement reaction, a more reactive element replaces a less reactive element from a compound. In a double displacement reaction, two atoms or a group of atoms switch places to form new compounds. In a displacement reaction, one displacement takes place

Answer 2

Displacement Reaction:

• Those reactions in which a more reactive element displaces a less active element from its compound are called displacement reactions.

Example - Reaction between Iron and Copper Sulphate Solution. When Iron [Fe] filings are added to Copper Sulphate solution [CuSO₄], The Iron displaces the Copper from the Copper Sulphate solution and forms Iron Sulphate [FeSO₄] and Copper is left out.  

Equation: Fe + CuSO₄ $\longrightarrow$ FeSO₄ + Cu  

Double-Displacement Reaction:

• A reaction in which new compounds are formed by mutual exchange of ions between two compounds.

Example - Reaction between Sodium Sulphate and Barium Chloride.  

Equation: Na₂SO₄ + BaCl₂ $\longrightarrow$ BaSO₄ + 2NaCl.

White Precipitate of Barium Sulphate is formed. Hence this reaction is also called a Precipitate reaction.