Single Choice

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

AFormation of $$Fe(CO)_5$$ from Fe
Correct Answer
BLiberation of $$H_2$$ from steam by iron at high temperature
CRusting of iron sheets
DDecolourization of blue $$CuSO_4$$ solution by iron

Solution

During the transformation, $$Fe +5CO \rightarrow Fe(CO)_5$$,

The oxidation number of iron metal is 0.

The oxidation number of iron in $$Fe(CO)_5$$ is also 0 as CO is a neutral ligand having 0 oxidation number.

There is no change in the oxidation number of iron.

Iron is not oxidized.

Hence, option $$A$$ is correct.

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