Rajat bought a bicycle for his son but his son did not take good care of the bicycle and left it outside the shade throughout the rainy season. After few months, he found a brown flaky substance formed on the surface of the bicycle. The chemical formula of brown flaky substance is

F e_{2} O_{3} . x H_{2} O

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F e_{2} O_{2} . x H_{2} O

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F e S_{2} . x H_{2} O

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F e S O_{4}

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Solution

The correct option is A
$F e_{2} O_{3} . x H_{2} O$
The brown flaky substance formed on the surface of a bicycle is rust and the process in which iron is attacked by air and moisture is commonly known as rusting of iron. The chemical formula of brown flaky substance is $F e_{2} O_{3} . x H_{2} O$ .

Hence, the correct answer is option (a).

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