Conc. HNO_(3) isstored in containers made up of

1.	Conc. HNO_(3) isstored in containers made up of
Answer» `CU` `Zn` `AL` `Sn`. Solution :Al is renderedpassiveby formation of a thin impervious LAYER of `Al_(2)O_(3)`on its surfacewhen broughtin contact with conc. `HNO_(3)`.

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