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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.

 

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Beryllium hydride cannot be prepared directly by reaction with H_{2}. It is prepared by reacting with LiAlH_{4} . The reactions that take place are given below:

8LiH+Al_{2}Cl_{6} \rightarrow 2LiAlH_{4}+6LiCl

2BeCl_{2}+LiAlH_{4}\rightarrow 2BeH_{2}+LiCl+AlCl_{3}

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