Na2S + 2HCL → 2NaCl + H2S is an example which type of reaction?

Option 3 : Double displacement reaction

The Correct Answer is Option 3 i.e Double displacement reaction.

• Displacement reaction:
  • In these reactions, an atom/ion present in a compound gets replaced by an atom/ion of another element.
  • Example: FeSO₄ + Zn → ZnSO₄ + Fe
• Decomposition reaction:
  • In these reactions, compound either of its own or upon heating decomposes to given two or more components out of which at least one is in the elemental state. 
  • Example: 2NaH → Na + H_2​
• Double displacement reaction:
  • In these reactions, two compounds exchange ions to form two new compounds.
  • Example: Na₂S + 2HCL → 2NaCl + H₂S
• Double decomposition reaction:
  • It is a chemical reaction in which the ions of two compounds mutually exchange their places to form two new compounds.
  • CuSO₄ + H₂S → CuS + H₂SO₄.