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Borax

Compound X ...

Question

Compound $X$ on reduction with $L i A l H_{4}$ gives a hydride $Y$ containing $21.72$ % hydrogen along with other products. The compound $Y$ reacts with air explosively resulting in boron trioxide. Identify $X$ and $Y$ . Give balanced reactions involved in the formation of $Y$ and its reaction with air. Draw the structure of $Y$ .

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Solution

REF.Image.
$4 B X_{3} + 3 L i A l H_{4} \to 2 B_{2} H_{6} + 3 L i X + 3 A l X_{3}$
$B_{2} H_{6} + 3 O_{2} \to B_{2} O_{6} + 3 H_{2} O$
$(x)$
$B_{2} H_{6}$

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