Question

When iron is rusted, it is?

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

Answer 1

The correct option is A Oxidised

Redox reaction between oxygen and iron in an environment containing moisture leads to formation of flaky red layer i.e Rust (Ferric oxide) on surface of iron structure.

$oxidation$ : $Fe\to F{e}^{+2}+2e^{-}$

$reduction$ : $O_2+4H^{+}+4e-\to 2H_{2}O$

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$Overallreaction$ : $4Fe+3O_2+2x{H}_{2}O\to 2F{e}_2{O}_3.x{H}_{2}O$

When Iron is rusted it is $oxidised$.

Hence the correct option is (A).