Which of the following graph shows the variationi of density of water increase in temperature ?

Options

A.
B.
C.
D.

Answer

To determine which graph shows the variation of the density of water with temperature, we need to understand the relationship between temperature and the density of water.

### Step-by-Step Solution:

1. **Understanding Density of Water**:
- Water has a unique property where its density varies with temperature. It reaches its maximum density at 4 degrees Celsius.

2. **Behavior Below 4 Degrees Celsius**:
- As the temperature decreases from room temperature (around 20 degrees Celsius) to 0 degrees Celsius, the density of water increases. This is because the water molecules come closer together as it cools down.

3. **Behavior Above 4 Degrees Celsius**:
- When the temperature increases beyond 4 degrees Celsius, the density of water starts to decrease. This is due to the thermal expansion of water, where the molecules move further apart as the temperature rises.

4. **Graph Characteristics**:
- The correct graph should show that the density increases as the temperature approaches 4 degrees Celsius from lower temperatures and then decreases as the temperature goes beyond 4 degrees Celsius.

5. **Analyzing the Graphs**:
- **Graph 1**: Shows maximum density at 4 degrees Celsius, which aligns with our understanding.
- **Graph 2**: Shows minimum density at 4 degrees Celsius, which is incorrect.
- **Graph 3**: Depicts a linear relationship, which does not represent the behavior of water density.
- **Graph 4**: Does not show maximum density at 4 degrees Celsius.

6. **Conclusion**:
- The correct graph that represents the variation of density of water with temperature is **Graph 1**, as it accurately depicts the maximum density at 4 degrees Celsius.