The following reaction is known as:

AgNO₃ + NaCl → AgCl + NaNO₃

The correct answer is double displacement reaction.

Key Points

• A double displacement reaction occurs when two compounds exchange ions to form two new compounds.
• In the given reaction: AgNO₃ + NaCl → AgCl + NaNO₃, the silver ion (Ag⁺) and sodium ion (Na⁺) exchange their anions (NO₃^- and Cl^- respectively).
• The product AgCl is a white precipitate, which confirms the reaction as a double displacement reaction.
• This type of reaction is commonly observed in aqueous solutions, especially when one of the products is insoluble and precipitates out.
• Double displacement reactions are also known as precipitation reactions when a solid precipitate is formed.

Additional Information

• Double Displacement Reaction:
  • It is a chemical reaction where two compounds exchange their ions to form two new compounds.
  • The general formula is: AB + CD → AD + CB.
  • These reactions often occur in aqueous solutions.
  • Examples include neutralization reactions and precipitation reactions.
• Precipitation Reaction:
  • A type of double displacement reaction where an insoluble substance (precipitate) is formed.
  • Example: BaCl₂ + Na₂SO₄ → BaSO₄ (precipitate) + 2NaCl.
  • Precipitates are generally indicated by a solid (↓) in chemical equations.
• Combination Reaction:
  • A reaction where two or more reactants combine to form a single product.
  • Example: 2H₂ + O₂ → 2H₂O.
• Decomposition Reaction:
  • A reaction where a single compound breaks down into two or more simpler products.
  • Example: 2HgO → 2Hg + O₂.
• Displacement Reaction:
  • A reaction where one element replaces another in a compound.
  • Example: Zn + CuSO₄ → ZnSO₄ + Cu.