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B
B2O3,BH4
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C
HBO2,H3BO3
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D
H2BO3,HBO2
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Solution
The correct option is AB2O3,H3BO3
Diborane catches fire spontaneously upon exposure to air. When diborane (B2H6) 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:
B2H6+3O2→B2O3+3H2O ΔH=–1976KJmol–1
Diborane react with water to form boric acid. B2H6+6H2O→2H3BO3+6H2