Which of the following is an example of a mixture?

Options

A. Sugar
B. Brass
C. `CO_2`
D. `NO_2`

Explanation

To determine which of the given options is an example of a mixture, we first need to understand what a mixture is.

### Step-by-Step Solution:

1. **Definition of a Mixture**: A mixture is formed when two or more substances come together without chemically bonding. This means that the individual components retain their own properties and can be separated by physical means.

2. **Identifying Examples**: We need to analyze the options provided to identify which one fits the definition of a mixture.

3. **Analyzing Options**:
- **Sugar (Glucose)**: The chemical formula for glucose is C6H12O6. This indicates that glucose is a compound where the elements carbon, hydrogen, and oxygen are chemically bonded together. Therefore, glucose is not a mixture.
- **Brass**: Brass is an alloy made from copper and zinc. In brass, these two metals are mixed together but do not form a new chemical compound. They retain their individual properties and can be separated physically. Thus, brass is a mixture.

4. **Conclusion**: Based on the analysis, the example of a mixture from the options provided is **Brass**.