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    Diborane - Practice Questions & MCQ

    Edited By admin | Updated on Sep 18, 2023 18:35 AM | #JEE Main

    Quick Facts

    • 33 Questions around this concept.

    Solve by difficulty

    How many isomeric disubstituted borazine $B_3 N_3 H_4 X_2$ are possible?

    $\ln B_2 H_6$

    Which of the following is electron-deficient ?

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    The hybridisation state of Boron atom in diborane is:

    The most convenient laboratory method for the preparation of diborane is 

    Diborane is :

    Diborane is used as high energy fuel due to

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    Diborane

    The simplest boron hydride known is diborane. B2H6 is prepared by the following methods:

    • Laboratory Method: In the laboratory, it is prepared by the reaction of sodium borohydride with iodine in a high boiling polyether solvent(CH3OCH2CH2)2O.
      2 \mathrm{NaBH}_{4}\: +\: \mathrm{I}_{2} \stackrel{\text { Polyether }}{\longrightarrow} \mathrm{B}_{2} \mathrm{H}_{6}\: +\: 2 \mathrm{NaI}\: +\: \mathrm{H}_{2}
    • Industrial Method: 
      2 \mathrm{BF}_{3}\: +\: 6 \mathrm{LiH} \stackrel{450 \mathrm{K}}{\longrightarrow} \mathrm{B}_{2} \mathrm{H}_{6}+\mathrm{LiF}
    • From Boron Halides:
      4 \mathrm{BX}_{3}+3 \mathrm{LiAlH_{4}}\: \rightarrow 2 \mathrm{B}_{2} \mathrm{II}_{6}+3 \mathrm{LiX}+3 \mathrm{AlX}_{3}
    • When boron halides and excess of hydrogen undergo reaction by passing silent electric discharge at low pressure, B2H6 is formed.
       

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