Define an acid. Give some example of organic and inorganic acids.

Explanation

### Step-by-Step Solution:

1. **Definition of an Acid**:
An acid is a substance that has a sour taste, can turn blue litmus paper red, and produces hydrogen ions (H⁺) when dissolved in water.

2. **Characteristics of Acids**:
- **Taste**: Acids are known for their sour taste.
- **Litmus Test**: They change the color of blue litmus paper to red.
...