In option (d), dihydrogen is not released. B2H6(g)+3O2‌
→
‌ Heat ‌
B2O3(s)+3H2O‌ Dibrone ‌ In all other options, dihydrogen is released. Oxidation of sodium borohydrate. 2NaBH4(s)+I2→2NaI+B2H6+H2↑ Hydrolysis of boranes Hydrolysis of boranes B2H6+6H2O→2H3BO3+3H2↑ Ammonia with diborane 3B2H6+6NH3→2B3N3H6+12H2