Question

Explain Combination reaction , Decomposition reaction and Displacement reaction

Answer 1

Dear Student

Combination Reaction: If in a Chemical equation, two or more reactants combine to form a single product then it is known as combination reaction.
e.g., H₂ + O₂ = H₂O

Decomposition Reaction: If in a chemical reaction a single substance decomposes to form two or more substances then it is known as decomposition reaction.
e.g., CaCO₃ = CaO + CO₂

Single Displacement Reaction: If in a chemical equation, more reactive elements displaces a less reactive element from its compound then it is known as displacement reaction.
e.g., Zn + CuSO₄ = ZnSO₄ + Cu

Double Displacement Reaction: If in a chemical reaction exchange of ions takes place then it is known as double displacement reaction. Precipitate formation takes place, so it is also known as precipitation reaction.
e.g., Na₂SO₄ + BaCl₂ = BaSO₄ + NaCl

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