In the reaction $L i H + A l H_{3} ⟶ L i A l H_{4}$ , $A l H_{3}$ and $L i H$ acts as:

Lewis acid and Lewis base

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Lewis base and Lewis acid

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Bronsted base and Bronsted acid

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None of the above

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Solution

The correct option is A Lewis acid and Lewis base
Reactions are:
$L i H \to L i^{+} + H^{-}$

$A l H_{3} + H^{-} \to A l H_{4}^{-}$

$L i H$ is lone pair donar and $A l H_{3}$ is lone pair acceptor.

So according to Lewis theory, $A l H_{3}$ acts as an acid and $L i H$ acts as a base.

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In the reaction

AlH₃and LiH acts as

Look at the following reaction:
$L i H + A l H_{3} ⟶ L i A l H_{4}$

Here $A l H_{3}$ and $L i H$ act as:

H^{+} a n d O H^{-} i o n s

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