Question

Compound formed when $B_2{H}_6$ reacts with oxygen is

• A. Hydrogen gas
• B. $B_2{O}_3$
• C. No reaction
• D. $B{O}_2$

Answer 1

The correct option is B $B_2{O}_3$

Diborane catches fire spontaneously upon exposure to air. When diborane $\left(B_2{H}_6\right)$ reacts with oxygen (or air) burns spontaneously to produce a large amount of heat. Thus, the reaction is exothermic. The reaction which takes place is:

$B_2{H}_6+3O_2\to B_2{O}_3+3H_{2}O.$
$\Delta H=–1976KJmo{l}^{–1}$
Hence, $B_2{O}_3$ (Boron Oxide) is formed.