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Concentrated nitric acid renders aluminium passive. Give reasons. |
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Answer» Solution :When conc. `HNO_(3)` is added to aluminium a thin protective layer of alumina `(Al_(2)O_(3))` is FORMED on its SURFACE which prevents further ACTION. As a result, Al BECOMES passive. `2Al+6HNO_(3)toAl_(2)O_(3)+6NO_(2)+3H_(2)O` |
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