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Conc. `HNO_(3)` is stored in containers made up of
A. `Cu`
B. `Zn`
C. `Al`
D. `Sn`.

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Correct Answer - C
Al is rendered passive by formation of a thin impervious layer of `Al_(2)O_(3)` on its surface when brought in contact with conc. `HNO_(3)`.

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