When water is heated from `0^(@)C` to `10^(@)C`, its volume

Options

A. increases
B. decreases
C. does not change
D. first decreases and then increases

Answer

To solve the question regarding the change in volume of water when heated from \(0^\circ C\) to \(10^\circ C\), we need to consider the unique properties of water, particularly its anomalous expansion behavior.

### Step-by-Step Solution:

1. **Understanding the Anomalous Behavior of Water**:
- Water exhibits anomalous expansion, which means that its volume does not increase uniformly with temperature. Instead, it behaves differently in certain temperature ranges.

2. **Identifying the Temperature Range**:
- The temperature range in question is from \(0^\circ C\) to \(10^\circ C\). Within this range, the behavior of water is crucial to understand.

3. **Minimum Volume at \(4^\circ C\)**:
- It is known that water reaches its maximum density (and thus minimum volume) at \(4^\circ C\). This means that as water is heated from \(0^\circ C\) to \(4^\circ C\), its volume actually decreases.

4. **Heating Beyond \(4^\circ C\)**:
- Once the temperature exceeds \(4^\circ C\) and goes up to \(10^\circ C\), the volume of water starts to increase again. Therefore, the volume decreases from \(0^\circ C\) to \(4^\circ C\) and then increases from \(4^\circ C\) to \(10^\circ C\).

5. **Conclusion**:
- Based on the analysis, when water is heated from \(0^\circ C\) to \(10^\circ C\), its volume first decreases (from \(0^\circ C\) to \(4^\circ C\)) and then increases (from \(4^\circ C\) to \(10^\circ C\)). Thus, the correct answer is that the volume "first decreases then increases".

### Final Answer:
The correct option is: **first decreases then increases**.