Which of the following processes does not involve oxidation of iron ?

Options

A. Rusting of iron sheets
B. Decolourisation of blue `CuSO_(4)` solution by iron
C. Formation of `Fe(CO)_(5)` from Fe
D. Liberation of `H_(2)` from steam by iron a high temperature.

Answer

C

Explanation

`overset(0)(Fe) + H_(2)O + O_(2) to overset(III)(Fe_(2)O_(3). xH_(2)O`
b) `overset(0)(Fe) +CuSO_(4) to overset(II)(FeSO_(4))+Cu`
c) `overset(0)(Fe) +5CO to overset(0)(Fe(CO)_(5))`
d) `overset(0)(Fe)+underset("Steam")(H_(2)O) to overset(III)(Fe_(2)O_(3))+H_(2)`
`therefore` Formationof `Fe(CO)_(5)` from Fe does not involve oxdiation of iron because there is no change in oxidation state.