Answer the following:

Mention one example each for the different types of chemical reactions.

i) Chemical combination: It is the reaction in which two or more reactants combine together to form a new product.

For example:

ii) Chemical decomposition: It is a reaction in which a single reactant breaks up into two or more products. For this purpose, sufficient energy is provided.

For example:

iii) Chemical displacement: It is the reaction in which a more reactive element displaces the less reactive from their compounds.

For example:

CuSO₄ + Fe → FeSO₄ + Cu

In the above reaction, Fe being more reactive displaces the Cu from its compound (CuSO₄) and form a new compound (FeSO₄)

iv) Double displacement reaction: In this reaction, the two reactants exchange their constituents chemically and form two products.

For example:

BaCl₂ + ZnSO₄ → BaSO₄ + ZnCl₂

In this reaction, exchange of ions of Ba and Zn are taking place.