Displacement reaction with example grade 10

When an atom or group of atoms in a molecule is replaced by another atom or group of atoms, such chemical reaction is called displacement reaction. Displacement reaction is of two types. They are:

When an atom in a molecule is replaced by another atom, such chemical reaction is called single displacement reaction.

For example:

Zinc + Hydrochloric acid → Zinc Chloride + Hydrogen

Zn + 2HCI → ZnCI₂ + H₂

Here, Zn is more reactive than H₂. So, Zn displaces H from the compound HCI.

A chemical reaction in which the molecules of the reactants get decomposed and exchange their corresponding ions to give new products is called a double displacement reaction.

For example:

AgNO₃ + NaCI → NaNO₃ + AgCI

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it is called acid bonding