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Q)

Which of the following facts is not correct ?

$\begin {array} {1 1} (A)\;\text{ Elements of Group 13 do not react directly with hydrogen} \\ (B)\;\text{The boron hydrides are know as boranes} \\ (C)\;\text{The structure of diborane is $H_3B - BH_3$} \\ (D)\;\text{ Aluminium hydride exists as white polymer} \end {array}$

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A)
The structure of diborane is
The two $BH_2$ groups lie in the same plane while the two bridging hydrogen atoms lie in a plane perpendicular to this plane.
Hence (C) is the correct option.
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