Question

Nitric acid does not react with which of the following metals?

• A. Chromium
• B. Magnesium
• C. Manganese
• D. Zinc

Answer 1

The correct option is A

Chromium

The correct option is (A):-

Explanation for the correct answer:

Oxide layer:-

1. It is actually a thin layer or the coating of the oxide as the Iron oxide.
2. This layer is actually formed or produced because of the anodic oxidation of the reactive metals which are present in the solutions where the dissolution as well as the oxidation will occur.
3. So, Chromium is basically the metal that will not dissolve in the concentrated Nitric acid (${\mathrm{HNO}}_3$) because of the formation of that passive film that is the oxide layer on the surface of the metal.
4. So, because of the formation of the oxide layer on the surface, the metal will not be able to react or show the action in the reaction.

Therefore, the correct answer is (A):- Chromium.