Question

Identify the process in which change in the oxidation state is five:

• A. $Cr _{2} O _{7}^{2-} \rightarrow 2 Cr ^{3+}$
• B. $MnO _{4}^{-} \rightarrow Mn ^{2+}$
• C. $CrO _{4}^{2-} \rightarrow Cr ^{3+}$
• D. $C _{2} O _{4}^{2-} \rightarrow 2 CO _{2}$

Answer 1

Answer: (B)

$MnO _{4}^{-}+5 e \rightarrow Mn ^{2+}$