In the process of rusting, iron (Fe) reacts with which of the following substances that are present in the atmosphere?
A
O2(air)
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B
H2O(moisture)
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C
Both O2 and H2O
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D
Fe2O3
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Solution
The correct option is C Both O2 and H2O In the process of rusting, iron reacts with oxygen and moisture that is present in the atmosphere to form hydrated iron oxide as per the following reaction: 2Fe+32O2+nH2O→Fe2O3.nH2O