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(A) Diborane $(B_2H_6)$ can be prepared by the following reactions: $I. 4BF_3 + 3LiAlH_4 \xrightarrow{	ext{ether}} 2B_2H_6 + 3LiF + 3AlF_3$ $II. 2BF_

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$I, II, IV$

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(A) Diborane $(B_2H_6)$ can be prepared by the following reactions: $I. 4BF_3 + 3LiAlH_4 \xrightarrow{	ext{ether}} 2B_2H_6 + 3LiF + 3AlF_3$ $II. 2BF_3 + 6NaH \xrightarrow{450 \ K} B_2H_6 + 6NaF$ $IV. 2NaBH_4 + I_2 \longrightarrow B_2H_6 + 2NaI + H_2$ Reaction $III$ $(Na_2B_4O_7 + H_2O)$ is a hydrolysis reaction of borax which does not produce diborane. Thus,reactions $I, II,$ and $IV$ are used to prepare diborane.

Which of the following reactions can be used to prepare diborane?
$I. BF_3 + LiAlH_4 \xrightarrow{\text{ether}}$
$II. BF_3 + NaH \xrightarrow{450 \ K}$
$III. Na_2B_4O_7 + H_2O \longrightarrow$
$IV. NaBH_4 + I_2 \longrightarrow$

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Which of the following reactions can be used to prepare diborane? $I. BF_3 + LiAlH_4 \xrightarrow{\text{ether}}$ $II. BF_3 + NaH \xrightarrow{450 \ K}$ $III. Na_2B_4O_7 + H_2O \longrightarrow$ $IV. NaBH_4 + I_2 \longrightarrow$