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. **Understand the Concept of Density in Water**:
- Normal water (H2O) reaches its maximum density at a specific temperature. This temperature is known to be 4 degrees Celsius.

2. **Identify the Properties of Heavy Water**:
- Heavy water (D2O) is chemically similar to normal water but has a higher molecular mass due to the presence of deuterium instead of hydrogen.

3. **Compare the Maximum Density of Heavy Water to Normal Water**:
- It is known that heavy water has a slightly higher maximum density temperature compared to normal water.

4. **Determine the Temperature for Heavy Water**:
- Research or recall that heavy water (D2O) reaches its maximum density at approximately 11.6 degrees Celsius.

5. **Select the Correct Option**:
- From the given options (4 degrees Celsius, 11.6 degrees Celsius, 0 degrees Celsius, and 273 Kelvin), the correct answer is 11.6 degrees Celsius.

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

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