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Lithium aluminium hydride can be prepared from the reaction of

1. LiH and Al(OH)3
2. LiCl and Al2H6
3. LiCl, Al and H2
4. LiH and Al2Cl6

Correct answer: LiH and Al2Cl6

Solution

Lithium aluminium hydride is synthesized through the reaction of lithium hydride with aluminium chloride, where lithium donates its hydride ions to aluminium, resulting in the formation of the desired compound.

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