First slide

Uses of Boron & Aluminium

Question

Select the correct choice for the following statements (I) and (II) :
(I) Al reacts with dil. HCI to give a clear solution and H₂ gas.
(II) Al reacts with aqueous alkali to give a clear solution and H₂ gas.

Moderate

A

Both the statements are correct
B

Both the statements are false
C

(l) is correct but [l) is false
D

(l) is false but (ll) is correct

Solution

$\begin{matrix} 2 Al (s) + 6 HCl (a q) ⟶ 2 {Al}^{3 +} (a q) + 6 {Cl}^{-} (aq) + 3 H_{2} (g) \\ 2 Al (s) + 2 NaOH (aq) + 6 H_{2} O (l) ⟶ 2 {Na}^{+} {[Al (OH)_{4}]}^{-} (aq) + 3 H_{2} (g) \end{matrix}$

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