A metal A, which is used in thermite process, when heated with oxygen gives an oxide B

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.

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Metal A is aluminium (Al) which is used in thermite process. Al reacts with oxygen to form aluminium oxide, Al2O3 (B), which is amphoteric in nature.