Question

What is Difference between displacement and double displacement reaction. Give example.​

Answer 1

Difference:

Displacement Reaction: It is a reaction where a more reactive metal or non-metal replaces a less reactive metal or non-metal from its salt solution.

Double Displacement Reaction: It is a reaction where an exchange of ions takes place.

General Form:

Displacement Reaction: A + BC ----------> AC + B, where A is more reactive than B.

Double Displacement Reaction: A⁺B⁻ + C⁺D⁻ ----------> A⁺D⁻ + C⁺B⁻

Examples:

Displacement Reaction:

Fe + CuSO₄ ----------> FeSO₄ + Cu

2Na + MgCl₂ ----------> 2NaCl + Mg

2Al + 3CuCl₂ ---------> 2AlCl₃ + 3Cu

Double Displacement Reaction:

BaI₂ + K₂SO₄ ------------> 2KI + BaSO₄

2NaCl + MgSO₄ -------------> Na₂SO₄ + MgCl₂

CaBr₂ + Na₂CO₃ -----------> CaCO₃ + 2NaBr