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Q.

The oxidation state of central metal  present in the complex lithium aluminium hydride is 

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a

+1

b

+3

c

both +1 and +3

d

-1

answer is B.

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Detailed Solution

Complex is Li[AlH4].

Since hydrogen is more electronegative than aluminum, thus the oxidation state of H will be taken as -1. So, the oxidation state of Al is +3.

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