Question

Write reactions to justify amphoteric nature of aluminium.

Answer 1

Aluminium is amphoteric in nature as it reacts with acids as well as alkalies.

$2Al+6HCl\to 2A{l}^{3+}+6C{l}^{-}+3H_2$

$2Al+2NaOH+6H_{2}O\to 2Na\left[Al\right(OH{)}_4{]}^{-}+3H_2$