Identify the type of chemical reaction

In this topic, you will learn how to identify the type of chemical reaction in an east way.

Generally, you are asked to name or identify the chemical reaction in the exams.

 Identify the type of chemical reaction

Following this easy method, you can identify a chemical reaction.

Basically, we will cover the following reactions

1.          Combination reaction

2.         Decomposition reaction

3.         Displacement reaction

4.         Double displacement reaction

So, these are the basic chemical reactions

 

Reactants are written on the left-hand side (LHS) and products are written on the right-hand side (RHS)

1.   Combination reaction

    A  +  B      → AB

  (Reactants )    (Product)

Trick – If you find the sign (+)  at LHS and a single product at RHS, then it is a combination reaction.

2Mg + O₂ → 2MgO

2H₂ + O₂ →2H₂O

 Both are combination reactions.

2.  Decomposition reaction

  AB     →    A   +  B

 (Reactants)    (Product)

Trick – If you find a single reactant at LHS and sign (+)  at RHS, then it is a decomposition reaction.

CaCO₃ → CaO + CO₂

2KClO₃ →2KCl + 3O₂

3. Displacement reaction

  A    + BC   →   AC +   B

(Reactants)        (Product)

 Trick – If you find one element and one compound (reactants ) with sign (+ ) at LHS and one element and one compound with sign (+)  at RHS, then it is a displacement reaction.

Zn + CuSO₄ →ZnSO₄ + Cu

Fe + CuSO₄ →FeSO₄ + Cu

4.   Double displacement reaction

 AB + CD → AD + CB

 (Reactants)        (Product)

Trick – If you find two compounds (reactants) with sign (+) at LHS and two compounds with sign (+) at RHS, then it is a double displacement reaction.

 

 Name the type of chemical reaction represented by the following equation

1.         Ba(OH)₂ + 2HBr → BaBr₂ + 2H₂O

2.         4Fe + 3O₂ →2Fe₂O₃

3.         2Al + Fe₂O₃ →Al₂O₃ +2Fe

4.         NH₄Cl →NH₃ + HCl

5.         Mg + 2HCl →MgCl₂ + H₂

 

MCQ Quiz to identify a chemical reaction