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Reactivity with Halogens and Hydrogen (Group 2)

How many of t...

Question

How many of the following can dissolve in aqueous $H C l$ as well as $N a O H$ solution to liberate $H_{2}$ ?
$B, A l, B_{2} H_{6}, B_{2} O_{3}, N a A l H_{4}, {A l}_{2} O_{3}, A l {C l}_{3}, {B F}_{3}$

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Solution

$B + H C l ⟶ X$ ( $X =$ No reaction)
$B + N a O H ⟶ N a_{3} B O_{3} + H_{2}$
$A l + H C l ⟶ A l C l_{3} + H_{2}$
$A l + N a O H + H_{2} O ⟶ N a A l O_{2} + H_{2}$
$B_{2} H_{6} + H C L ⟶ B C l_{3} + H_{2}$
$B_{2} H_{6} + N a O H + H_{2} O ⟶ N a B (O H)_{4} + H_{2}$
$B_{2} O_{3} + H C l ⟶ X$
$B_{2} O_{3} + N a O H ⟶ N a B O_{2} + H_{2} O$
$N a A l H_{4} + H C l ⟶ N a C l + A l C l_{3} + H_{2}$
$N a A l H_{4} + N a O H ⟶ X$
$A l_{2} O_{3} + N a O H ⟶ N a A l O_{2} + H_{2} O$
$A l_{2} O_{3} + H C l ⟶ N a A l O_{2} + H_{2} O$
$A l C l_{3} + H C l ⟶ X$
$A l C l_{3} + N a O H ⟶ A l (O H)_{3} + N a C l$
$B F_{3} + H C l ⟶ X$
$B F_{3} + N a O H ⟶ N a B F_{4} + N a_{2} B_{4} O_{7} + H_{2} O$
Only $A l, B_{2} H_{6}$ can dissolve in aqueous $H C l$ as well as $N a O H$ solution to liberate $H_{2}$

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