When iron is rusted, it is

Options

A. Oxidised
B. Iodide ion
C. Oxidising agent
D. Reducing agent

Explanation

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