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# 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.**

Aluminium and Iron are used in a thermite process, however, only aluminium when heated with oxygen, gives aluminium oxide, which is an amphoteric substance, meaning it can react with both acids and bases. Hence,

**A is aluminium and B is aluminium oxide.**The reaction of aluminium oxide with hydrochloric acid can be written as follows:

$Al_2O_3+ 6HCl →2AlCl_3+3H_2O$

The reaction of aluminium oxide with sodium hydroxide can be written as follows:

$Al_2O_3+2NaOH →2NaAlO_2+H_2O$

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