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Question: Answered & Verified by Expert
$\mathrm{BeH}_2$ can be prepared by the reaction of
ChemistryHydrogenTS EAMCETTS EAMCET 2018 (05 May Shift 1)
Options:
  • A $\mathrm{BeCl}_2$ with $\mathrm{LiAlH}_4$
  • B Be with $\mathrm{H}_2$
  • C Be with water
  • D Be with liquid ammonia
Solution:
2654 Upvotes Verified Answer
The correct answer is: $\mathrm{BeCl}_2$ with $\mathrm{LiAlH}_4$
When $\mathrm{BeCl}_2$ reduced in presence of $\mathrm{LiAlH}_4$ then we obtained $\mathrm{BeH}_2$.
$$
\mathrm{BeCl}_2 \xrightarrow{\stackrel{4[\mathrm{H}]}{\mathrm{LiAlH}_4} \xrightarrow{\longrightarrow}} \mathrm{BeH}_2+2 \mathrm{HCl}
$$

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