When iron is rusted, it is

Options

A. Oxidised
B. Reduced
C. Evaporated
D. Decomposed

Answer

A

Explanation

`Fe(s)rarrFe^(2+)+2e^(-)` (Oxidation)
`O_(2)+4H^(o+)4e^(-)rarr2H_(2)O` (Reduction)
Atmospheric oxidation:
`2Fe^(2+)+2H_(2)O+(1)/(2)O_(2)rarrFe_(2)O_(3)+4H^(o+)`
Rust is `Fe_(2)O_(3)xH_(2)O`
Correosion or rusting occurs in the presence of water and air.