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Aluminium becomes passive in :...

Aluminium becomes passive in :

A

`Cr_(2)O_(3)`

B

`conc HNO_(3)`

C

`HClO_(4)`

D

All of the above

Text Solution

Verified by Experts

The correct Answer is:
B
Due to the formation of layer of `Al_(2)O_(3)` on the surface of `Al`, on reaction with conc `HNO_(3), Al` becomes passive.
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