During corrosion, iron reacts with which of the following substances that are present in the atmosphere?

Oxygen

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Moisture

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Nitrogen

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Carbon dioxide

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Solution

The correct options are
A Oxygen
B Moisture
Corrosion is gradual degradation of metal surface when it is exposed to air and moisture.
During corrosion of iron, the metal reacts with oxygen and moisture present in the atmosphere to form rust (iron oxide). Rust is a flaky brown coloured layer formed on the surface of iron objects. It makes the iron articles weaker.

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