Question 29
EasyOriginal questionAn iron nail rusts only when it is exposed to
Show the answer and explanation
CorrectNot quiteAnswer C
Correct answer: C
Explanation
Rust is hydrated iron oxide, formed when iron reacts with oxygen in the presence of water.
A nail in dry air, or in boiled water sealed with oil, does not rust.
- Concept
- Conditions for rusting
- Typical timeTypical
- 35 s
- Your timeYours
- —
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