The metal iron (Fe) when exposed to moist atmosphere forms hydrated iron oxide as per the following reaction - Fe+O2+Y→Fe2O3.nH2O
This process is known as rusting which does not take place in the absence of ‘Y’. Identify ‘Y’ in the reaction.
A
Fe(OH)3
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B
H2O2
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C
H2O
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D
Fe(OH)2
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Solution
The correct option is CH2O In the process of rusting, the metal iron reacts with oxygen and moisture that is present in the atmosphere to form hydrated iron oxide as per the following reaction: 2Fe(s)+32O2(g)+nH2O(l)→Fe2O3.nH2O(s)
The moisture present in atmosphere refers to water vapour (H2O).