According to Lewis theory, neutralisation is the

Options

A. transfer of proton from acid to base
B. transfer of proton from base to acid
C. transfer of electron pair from acid to base
D. transfer of electron pair from base to acid

Answer

### Step-by-Step Solution:

1. **Understanding Neutralization**:
- Neutralization is a chemical reaction where an acid reacts with a base to produce a salt and water.
- This is a fundamental concept in chemistry and is commonly represented by the general equation:
\[ \text{Acid} + \text{Base} \rightarrow \text{Salt} + \text{Water} \]

2. **Lewis Theory of Acids and Bases**:
- According to Lewis theory, acids and bases are defined based on their ability to accept or donate electron pairs.
- **Lewis Acid**: A substance that can accept an electron pair (electron acceptor).
- **Lewis Base**: A substance that can donate an electron pair (electron donor).

3. **Application of Lewis Theory to Neutralization**:
- In the context of neutralization, the base donates an electron pair to the acid.
- This transfer of electron pairs is what characterizes the neutralization reaction according to Lewis theory.

4. **Example of Neutralization**:
- Consider the reaction between ammonia (NH3) and boron trifluoride (BF3).
- Here, NH3 acts as the Lewis base because it has a lone pair of electrons on nitrogen that it can donate.
- BF3 acts as the Lewis acid because boron is electron-deficient and can accept the electron pair from NH3.
- The result of this interaction is the formation of an adduct, which is a complex formed by the acid and base.

5. **Conclusion**:
- Therefore, according to Lewis theory, neutralization can be described as a reaction where a Lewis base donates an electron pair to a Lewis acid, resulting in the formation of a salt (adduct).