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The constituent of air necessary in the rusting process a...

The constituent of air necessary in the rusting process are

A.

O2 and H2O

B.

Ar and CO2

C.

CO2 and H2O

D.

O2 and CO2

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Correct answer is A

Rust is an iron oxide, a usually red oxide formed by the redox reaction of iron and oxygen in the presence of water or air moisture.

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