Explain with the help of reactions that how heavy water is used in the preparation of deuterium compounds?

Explanation

To explain how heavy water (D2O) is used in the preparation of deuterium compounds, we can look at several chemical reactions that illustrate this process. Heavy water contains deuterium, an isotope of hydrogen, which allows for the formation of various deuterium-containing compounds.

### Step-by-Step Solution:

1. **Understanding Heavy Water**:
- Heavy water is chemically represented as D2O, where D represents deuterium (²H), an isotope of hydrogen. Unlike regular water (H2O), heavy water has a greater mass due to the presence of deuterium.

2. **Reaction with Sodium**:
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