Question

Lithium aluminium hydride can be prepared from the reaction of:

• A. \(LiCl \ and \ Al_2H_6\)
• B. \(LiH \ and \ Al_2Cl_6\)
• C. \(LiCl, Al \ and \ H_2\)
• D. \(LiH \ and \ Al(OH)_3\)

Answer 1

The Correct Option is B

Step 1: Reaction for Preparation of \(\text{LiAlH}_4\)
Lithium aluminium hydride \(\text{LiAlH}_4\) is prepared by the reaction of lithium hydride (\(\text{LiH}\)) with aluminium chloride \(\text{Al}_2\text{Cl}_6\). The reaction is as follows:
\[8\text{LiH} + \text{Al}_2\text{Cl}_6 \rightarrow 2\text{LiAlH}_4 + 6\text{LiCl}.\]
Conclusion: The correct reactants for preparing \(\text{LiAlH}_4\) are \(\text{LiH}\) and \(\text{Al}_2\text{Cl}_6\). Therefore, the correct answer is (2)