Lithium hydride can be used to prepare other useful hydrides. Beryllium hydride is one of them. Suggest a route for the preparation of beryllium hydride starting from lithium hydride. Write chemical equations involved in the process.

Explanation

To prepare beryllium hydride (BeH₂) starting from lithium hydride (LiH), we can follow these steps:

### Step 1: Preparation of Lithium Aluminium Hydride (LiAlH₄)
1. **React lithium hydride with aluminium chloride (AlCl₃)**.
- The reaction can be written as:
\[ 8 \text{LiH} + \text{Al}_2\text{Cl}_6 \rightarrow 2 \text{LiAlH}_4 + 6 \text{LiCl} \]
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