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.

AcademicChemistryNCERTClass 10

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:
$Al_2O_3+2NaOH →2NaAlO_2+H_2O$ 
raja
Updated on 10-Oct-2022 13:27:26

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