When iron (Fe) is exposed to moist atmosphere for a long time, rust is formed which is a layer of a brown flaky substance. What is the chemical composition of this iron rust?

Iron oxide

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Hydrated Iron oxide

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Iron sulphate

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Iron hydroxide

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Solution

The correct option is B
Hydrated Iron oxide

In the process of rusting, iron reacts with oxygen and moisture that are present in the atmosphere to form hydrated iron oxide as per the following reaction:
$4 F e + 3 O_{2} + 2 n H_{2} O \to 2 F e_{2} O_{3} . n H_{2} O$

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When iron (Fe) is exposed to moist atmosphere for a long time, rust is formed which is a layer of a brown flaky substance. What is the chemical composition of this iron rust?

The correct option is B Hydrated Iron oxide In the process of rusting, iron reacts with oxygen and moisture that are present in the atmosphere to form hydrated iron oxide as per the following reaction: 4Fe+3O2+2nH2O → 2Fe2O3 .nH2O

The correct option is B
Hydrated Iron oxide

In the process of rusting, iron reacts with oxygen and moisture that are present in the atmosphere to form hydrated iron oxide as per the following reaction:
$4 F e + 3 O_{2} + 2 n H_{2} O \to 2 F e_{2} O_{3} . n H_{2} O$