Укажите тип химических реакций :

1) 4Al + 3O2 -> Al2O3
2) 2Al + 6H2O -> 2Al(OH)3 + 3H2
3) 2Al + 6HCl -> 2AlCl3 + 3H2
4) 2Al + 2NaOH + 6H2O -> 2Na[Al(OH)4] + 3H2
5) 8Al + 3Fe3O4 -> 4Al2O3 + 9Fe

Буду благодарен :) ​
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