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The passivity of iron in concentrated ni...

The passivity of iron in concentrated nitric acid is due to

A

Ferric nitrate coating on the metal

B

Ammonium coating on the metal

C

A thin oxide layer coating on the metal

D

A hydride coating on the metal

Text Solution

Verified by Experts

The correct Answer is:
C
A thin layer of `Fe_(3)O_(4)` is formed on the Fe metal.
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