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Aluminium becomes passive in :...

Aluminium becomes passive in :

A

conc `HNO_(3)`

B

`H_(2)CrO_(4)`

C

`HClO_(4)`

D

conc `HCl`

Text Solution

Verified by Experts

The correct Answer is:
A, B, C
Due to the formation of oxide layer `(Al_(2)O_(3))` on the surface.
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Assertion (A) : Aluminum is passive towares conc HNO_2 Reason (R) : Due to formation of layer of nitrate on aluminium