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Compound (A) on reaction with iodine in the solvent diglyme gives a hydride (B) and hydrogen gas. The product (B) is instantly hydrolysed by water or aqueous alkali forming compound ( C) and liberating hydrogen gas. The compound ( C) in aqueous solution behaves as a week mono basic acid. But in presence of certain organic polyhydroxy compound behaves as a strong monobasic acid. The hydride (B) in air catches fire spontaneously forming oxide which gives coloured beads with transition metal compounds. Which of the following statement is correct for the hydride (B)? |
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Answer» One mole of it react with two moles of `HCI`. (B)`B_(2)H_(6)+NH_(3) underset("low temperature")overset("excess"NH_(3))toB_(2)H_(6).2NH_(3)` `B_(2)H_(6).2NH_(3)` is ionic compound and comprises `[H_(3)NtoBH_(2)larrNH_(3)]^(+)` and `[BH_(4)]^(-)` ions. ( C)`B_(2)H_(6)+2(Me)_(3)N to 2[Me_(3)N.BH_(3)]` (D)`B_(2)H_(6)+6H_(2)O to 2B(OMe)_(3)+6H_(2)` Reactions involved `(A)2Na[BH_(4)](A)+I_(2)underset("solution")overset("in diglyme")to B_(2)H_(6) , (B)+H_(2)+2NaI` `B_(2)H_(6)+6H_(2)Oto2H_(3)BO_(3)( C)+3H_(2)` `B(OH)_(3)+2H_(2)O hArrH_(3)O^(+) + [B(OH)_(4)]^(-) , pK=9.25`  `B_(2)H_(6)(B)+3O_(2)toB_(2)O_(3)+3H_(2)O` `CoO + B_(2)O_(3)to Co(BO_(2))_(2)`(cobalt metaborate -blue colour bead). |
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