What is released when $B_{2} H_{6}$ reacts with oxygen?

Hydrogen gas

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B_{2} O_{3}

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no reaction

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B O_{2}

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Solution

The correct option is D $B_{2} O_{3}$
When diborane ( $B_{2} H_{6}$ ) reacts with oxygen (or air), it catches fire. It burns in oxygen and the reaction is exothermic.
The reaction which takes place is:
$B_{2} H_{6}$ + 3 $O_{2}$ $\to$ $B_{2} O_{3}$ + 3 $H_{2} O$ .
Hence, $B_{2} O_{3}$ (Boron Oxide) is formed.

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