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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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`BeH_(2)` cannot be prepared directly by heating powdered beryllium with dihydrogen . It can , however , be prepared from the corresponding halides by reduction with complex alkali metal hydrides such as lithium aluminium hydride as follows .
`8 LiH + Al_(2) Cl_(6) to 2 LiAlH_(4) + 6 LiCl`
`2 BeCl_(2) + LiAlH_(4) to 2 BeH_(2) + LiCl + AlCl_(3)`.

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