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STD 11 - 7. Redox reactions — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 11 - 7. Redox reactions4 Marks
MCQ
Identify the process in which change in the oxidation state is five :
  • A
    $\mathrm{C}_{2} \mathrm{O}_{4}^{2-} \rightarrow 2 \mathrm{CO}_{2}$
  • B
    $\mathrm{CrO}_{4}^{2-} \rightarrow \mathrm{Cr}^{3+}$
  • C
    $\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-} \rightarrow 2 \mathrm{Cr}^{3+}$
  • ✓
    $\mathrm{MnO}_{4}^{-} \rightarrow \mathrm{Mn}^{2+}$
✓

Answer

Correct option: D.
$\mathrm{MnO}_{4}^{-} \rightarrow \mathrm{Mn}^{2+}$
d
$\underset{(+7)}{\mathrm{MnO}_{4}^{-}} \rightarrow \underset{(+2)}{\mathrm{Mn}^{2+}} 5 \mathrm{e}^{-}$change

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