Question

Iron reacts with air in presence of water and forms a brown powder which is called rust. Chemically rust is
Options
O iron oxide
hydrated iron oxide
O iron sulphate
iron carbonate​

Answer 1

➡ iron oxide..

Rust is an iron oxide, a usually reddish brown oxide formed by the reaction of iron and oxygen in the presence of water or air moisture. ... Rust consists of hydrated iron(III) oxides Fe2O3·nH2O and iron(III) oxide-hydroxide (FeO(OH), Fe(OH)3). It is typically associated with the corrosion of refined iron.

Answer 2

Answer:

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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. ... This prevents the metal below from coming into contact with air (containing oxygen).