A metal A, which is used in thermite process, when heated with oxygen gives an oxide B, which is amphoteric in nature. Identify A and B. Write down the reactions of oxide B with HCl and NaOH
Metal A is aluminium and B is Al2O3 .
Reaction of aluminium oxide with HCl:
Al2O3 + HCl → 2AlCl3 + 3H2O
Reaction of aluminium oxide with NaOH:
Al2O3 + 2NaOH → 2NaAlO2 + H2O
