The reaction between an acid and a base to form salt and water is called :

Options

A. carbonation
B. hydrogenation
C. neutralisation
D. titration

Answer

**Step-by-Step Solution:**

1. **Understanding the Reaction**: The question asks about the type of reaction that occurs when an acid reacts with a base to produce salt and water.

2. **Identifying the Reaction**: The reaction between an acid and a base is known as a neutralization reaction. This is a fundamental concept in chemistry where the properties of acids and bases cancel each other out.

3. **Example of Neutralization**: For instance, if hydrochloric acid (HCl) reacts with sodium hydroxide (NaOH), the products of this reaction are sodium chloride (NaCl), which is a salt, and water (H2O). The equation for this reaction can be written as:
\[ \text{HCl} + \text{NaOH} \rightarrow \text{NaCl} + \text{H}_2\text{O} \]

4. **Conclusion**: Therefore, the reaction between an acid and a base to form salt and water is called a **neutralization reaction**.

**Final Answer**: Neutralization reaction.

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