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Q.

Which of the following formulas for iron oxide is valid when iron or an alloy containing iron oxidizes or chemically interacts with oxygen to generate rust?

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a

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b

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c

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d

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answer is B.

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Detailed Solution

Rust or iron oxide occurs when iron or an alloy that contains iron oxidizes or chemically reacts with oxygen.

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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