Aluminium reacts with acid as well as base. This shows amphoteric nature of aluminium. 2Al (s) + 6HCl (dil.) →2AlCl3 (aq) + 3H2 (g) 2Al (s) + 2NaOH (aq) + 6H2O (l) →2Na+ [Al (OH)4]– (aq) + 3H2 (g)
<p>Aluminium reacts with acid as well as base. This shows amphoteric nature of aluminium.<br>2Al (s) + 6HCl (dil.) <strong>→</strong>2AlCl<sub>3</sub> (aq) + 3H<sub>2</sub> (g)<br>2Al (s) + 2NaOH (aq) + 6H<sub>2</sub>O (l) <strong>→</strong>2Na+ [Al (OH)<sub>4</sub>]<sup>–</sup> (aq) + 3H<sub>2</sub> (g)</p>
Proteins on hydrolysis gives α-amino acid because α-amino acids are building block of proteins. It is also fact that amino acids contain both –NH2 and –COOH group.
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