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Redox Reactions — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryRedox Reactions1 Mark
MCQ
Which of the following processes does not involve oxidation of iron?
  • A
    Rusting of iron sheets.
  • B
    Decolourisation of blue $\ce{CuSO}_4$ solution by $\ce{Fe}.$
  • ✓
    Formation of $\ce{Fe(CO)}_5$ from $\ce{Fe}.$
  • D
    Liberation of $H_2$ from steam by iron at high temperature.
✓

Answer

Correct option: C.
Formation of $\ce{Fe(CO)}_5$ from $\ce{Fe}.$
$\because$ There is no change in oxidation state.
$\text{Fe}+5\text{CO}\xrightarrow{ \ \ \ \ \ \ }\text{Fe(CO)}_5$
$0\ \ \ \ \ \ \ \ \ \ \ 0 \ \ \ \ \ \ \ \ \ \ \ \ 0 \ \ \ \ \ 0$

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