Amphoteric nature means showing both acidic and basic nature.
Acidic nature( Reaction with alkalis)
2Al (s) + 2NaOH(aq) + 6H₂O(l) 2 Na+ [Al(OH)₄] –(aq) + 3H₂(g)

<div> Sodium tetrahydroxo aluminate(III)</div>

Basic nature(Reaction with acids)
2Al(s) + 6HCl (aq) → 2Al³⁺(aq) + 6Cl^– (aq) + 3H₂ (g)

2Thank You

Rakesh Chaubey 6 years, 3 months ago

Because the oxide of aluminium is show both character of acid as well as basic

1Thank You

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