1.

Expain the reaction of aluminium towards acid.

Answer»

Solution :Aluminium reacts with dil. HCI liberating hydrogen.
`2AI_((s)) + 6HCI _(AQ) to 2AICI_(3(aq)) + 3H_(2(g)).` Aluminium becomes passive when TREATED with conc.
`HNO_(3)` due to the FORMATION of a thin PROTECTIVE layer of oxide `(AI_(2)O_(3))` on its SURFACE.


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