Question

What
two substance
must be present for iron to rust​

Answer 1

Answer: water and oxygen

Explanation:

The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust. Iron and steel rust when they come into contact with water and oxygen – both are needed for rusting to occur.

Answer 2

Explanation:

Solution: B. Rusting of iron takes place only in presence of oxygen and water vapour.

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