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Redox Reactions — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryRedox Reactions1 Mark
MCQ
In the compounds $\mathrm{KMnO}_4$ and $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7,$ the highest oxidation state is of the element.
  • A
    Potassium
  • B
    Chromium
  • C
    Oxygen
  • ✓
    Manganese
✓

Answer

Correct option: D.
Manganese
In $\mathrm{KMnO}_4​, K$ is in $+1$ oxidation state, $O$ is in $-2$ oxidation state $\text{Mn}$ is present in $+7$ oxidation state.
In $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7​, K$ is in $+1$ oxidation state, $O$ is in $-2$ oxidation state $\text{Cr}$ is present in $+6$ oxidation state.
So $\text{Mn}$ is present in highest oxidation state.

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