NaOH + HCl → NaCl + H₂O is a:

To identify the type of reaction, let's analyze the reactants and products in the chemical equation: $$\text{NaOH} + \text{HCl} \rightarrow \text{NaCl} + \text{H}_2\text{O}$$ 1. **Analyze Reactants**: * $\text{NaOH}$ (Sodium hydroxide) is a strong base because it provides hydroxide ions ($\text{OH}^-$). * $\text{HCl}$ (Hydrochloric acid) is a strong acid because it provides hydrogen ions ($\text{H}^+$). 2. **Analyze Products**: * $\text{NaCl}$ (Sodium chloride) is a salt. * $\text{H}_2\text{O}$ is water. 3. **Define Reaction Type**: A chemical reaction in which an acid reacts with a base to form a salt and water is known as a **Neutralisation reaction**. In this process, the $\text{H}^+$ ions from the acid combine with the $\text{OH}^-$ ions from the base to form neutral water: $$\text{H}^+ + \text{OH}^- \rightarrow \text{H}_2\text{O}$$ Since the given reaction follows the pattern $\text{Acid} + \text{Base} \rightarrow \text{Salt} + \text{Water}$, it is a neutralisation reaction.