1.

HNO(3) can be in Al vessel bu NaOH cant't be, because

Answer»

`Al` developes a protective layer of oxide with `HNO_(3)`
`Al` reacts with `HNO_(3)` to DISSOLVE it
`Al` reacts with `NaOH` FORMING `NaAlO_(2)`
`Al` develops a protective layer of oxide with `NaOH`.

Solution :Al turns passive due to formation of protective oxide layer, HENCE reaction ceases. But Al dissolves in `NaOH` forming `NaAlO_2` hence it cannot be stored in Al vessels.
`2AL + 2NAOH + 2H_2O rarr 2NaAlO_2 + 3H_2`.


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