reactivity of aluminium decrease if it is dipped in Hno3 explain
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Aluminium is a smart metal of the boron family, it reacts with oxygen to create a film or layer of its oxide. Thuswhen dipped in nitric acid it occurs passive because of the oxide layer . ... Al reacts with HNO3 forms protective layer of Al2O3. This layer inhibits further reaction.
shivamchaturvedixx:
can you explain more better
yes i can,Fuming nitric acid renders aluminium (and iron) passive. This is because a layer of oxide coating is formed on the surface of the metal which prevents the reaction to take place. However, if the oxide layer is removed mechanically or chemically, the reaction starts again.
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