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.

(N/A) Beryllium hydride $(BeH_2)$ cannot be prepared directly by the reaction of beryllium with $H_2$. It is prepared by reacting $BeCl_2$ with lithium aluminium hydride $(LiAlH_4)$.
First,$LiAlH_4$ is prepared from lithium hydride $(LiH)$:
$8 LiH + Al_2Cl_6 \rightarrow 2 LiAlH_4 + 6 LiCl$
Then,$BeH_2$ is prepared by the reaction:
$2 BeCl_2 + LiAlH_4 \rightarrow 2 BeH_2 + LiCl + AlCl_3$