Join ExamsbookAnswer : 3. "chromic acid"
In addition to nitric acid, another acid which may render iron passive is5
Q: In addition to nitric acid, another acid which may render iron passive is
- 1acetic acidfalse
- 2oxalic acidfalse
- 3chromic acidtrue
- 4citric acidfalse
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Answer : 3. "chromic acid"
Explanation :
Answer: C) chromic acid Explanation: Passivity of iron is due to formation of an extremely thin and impervious film of ferrosoferric oxide Fe3O4on the surface of iron. Chromic acid, being a powerful oxidising agent (like nitric acid ) renders iron passive.
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