Question

give a chemical equation when iron reacts with oxide

Answer 1

hey their here is your answer
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Air-free water has little effect uponiron metal. However, iron metal reacts in moist air by oxidation to give a hydrated iron oxide. This does not protect the iron surface to further reaction since it flakes off, exposing more iron metal to oxidation.

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Answer 2

hey dude,

Iron reacts with water to form iron oxide, along with the release of hydrogen. It displaces hydrogen from water, which is evolved or released as a gas.
The equation for this would be
4Fe + 6H20 gives 2Fe2O3 + 3H2

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