How is lithium hydride useful ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Lithium Hydride (LiH):**
- Lithium hydride is a chemical compound formed from lithium and hydrogen. It is known for its ionic bonding and is a white solid at room temperature.

2. **Reactivity of Lithium Hydride:**
- At moderate temperatures, lithium hydride is relatively unreactive with common elements such as oxygen and chlorine. This property limits its direct applications.

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