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Iron is rendered passive by treatment wi...

Iron is rendered passive by treatment with

A

`HCl`

B

`H_(2)SO_(4)`

C

`Cu`

D

`Ag`

Text Solution

Verified by Experts

The correct Answer is:
D
`HNO_(3)` being strong oxiding agent oxidises iron to its oxides `(Fe_(3)O_(4))` which forms a thin protective layer over the metal. This makes the iron passive
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