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Q.

What two things cause iron to Rust?

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a

Oxygen and iron

b

Hydrogen and water

c

Oxygen and water

d

Nitrogen and water

answer is C.

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Detailed Solution

Rusting of iron is a chemical change process. In this process, iron reacts with oxygen and water present in its surroundings to form a new compound which we call rust. Chemically rust is known as hydrated Ferric oxide and its chemical formula is Fe2O3.xH2O

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