What are zwitterions ?Give one example.

Explanation

### Step-by-Step Solution:

1. **Definition of Zwitterions**:
Zwitterions are molecules that have both positive and negative charges but are overall electrically neutral. They contain equal numbers of positively and negatively charged functional groups.

2. **Characteristics of Zwitterions**:
- They are dipolar, meaning they have both a positive and a negative pole.
- Zwitterions can form through the neutralization of an acid and a base, where the acid donates a proton (H⁺) to the base.
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