Question

A metal X ,which is used in thermit process , when heated with oxygen gives an oxide Y which is amphoteric in nature . Identify X and Y. Write balanced chemical equation of the reaction of oxide Y with hydrochloric acid and sodium hydroxide .

Answer 1

When aluminium is heated in oxygen it forms aluminium oxide which is amphoteric in nature .
`4Al + 3O_(2) to 2Al_(2)O_(3)`
X is aluminium .
Y is aluminium oxide
Reaction of Aluminium oxide with hydrochloric acid:
`Al_(2)O_(3)+6HCl to 2AlCl_(3)+3H_(2)O`
REaction of Aluminium oxide with sodium hydroxide
`Al_(2)O_(3)+2NaOH to 2NaAlO_(2)+H_(2)O`