Q46Short answer
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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A — Al; B — Al2 O3 Al2 O3 + 6HCl → 2AlCl3 + 3H2O Al2 O3 + 2NaOH → 2NaAlO2 + H2O