Heavy water has maximum density at

Options

A. `4^(@)C`
B. `11.6^(@)C`
C. `O^(@)C`
D. 273 K

Answer

To determine the temperature at which heavy water (D2O) has maximum density, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Heavy Water**: Heavy water, or D2O, is a form of water where the hydrogen atoms are replaced by deuterium, an isotope of hydrogen. This makes heavy water denser than ordinary water (H2O).

2. **Density of Water**: The density of water varies with temperature. For ordinary water, the maximum density occurs at around 4 degrees Celsius. Similarly, heavy water also has a specific temperature at which it reaches its maximum density.

3. **Researching Heavy Water Properties**: It is known from theoretical studies and experiments that heavy water has its maximum density at a temperature of approximately 11.6 degrees Celsius.

4. **Conclusion**: Therefore, the maximum density of heavy water (D2O) occurs at 11.6 degrees Celsius.

5. **Selecting the Correct Option**: If options are provided, the correct answer would be the one that states 11.6 degrees Celsius.

### Final Answer:
Heavy water has maximum density at **11.6 degrees Celsius**.

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