Difference between displacement and double displacement reactions (with examples)

Answer:

• Displacement Reaction: A more reactive element displaces a less reactive one from a compound.
  Zn + CuSO4 → ZnSO4 + Cu

• Double Displacement Reaction: Two compounds exchange ions to form two new compounds.
  Na₂SO₄ + BaCl₂ → BaSO₄↓ + 2NaCl