Same chapter3 marksDifficulty: Medium
Give two examples showing that concentrated nitric acid is a powerful oxidising agent.
Study of Compounds: Nitric Acid
1 markDifficulty: Medium
Concentrated nitric acid renders iron passive because it:
- adissolves the iron completely
- bforms a protective layer of oxide on the surface
- creduces the iron
- ddoes not react with iron at all
Original Khojo Papers practice question — not from a past board paper.
Answer
forms a protective layer of oxide on the surface
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The thin, continuous oxide film prevents the acid from reaching the metal underneath.
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