Iron reacts with air in presence of water and forms a brown powder which is called rust. Chemically rust is OptionsO iron oxidehydrated iron oxideO iron sulphateiron carbonate

Iron reacts with air in presence of water and forms a brown powder whi

1.	Iron reacts with air in presence of water and forms a brown powder which is called rust. Chemically rust is OptionsO iron oxidehydrated iron oxideO iron sulphateiron carbonate
Answer» 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.