Question: Identify the process in which change in the oxidation state is five :
$\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-} \rightarrow 2 \mathrm{Cr}^{3+}$
$\mathrm{MnO}_{4}^{-} \rightarrow \mathrm{Mn}^{2+}$
$\mathrm{CrO}_{4}^{2-} \rightarrow \mathrm{Cr}^{3+}$
$\mathrm{C}_{2} \mathrm{O}_{4}^{2-} \rightarrow 2 \mathrm{CO}_{2}$
Correct Option: , 2
Solution:
$\mathrm{MnO}_{4}^{-}+5 \mathrm{e} \rightarrow \mathrm{Mn}^{+2}$
