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$\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-} \rightarrow 2 \mathrm{Cr}^{3+}$
- ✓$\mathrm{MnO}_{4}^{-} \rightarrow \mathrm{Mn}^{2+}$
