Question

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

• A. $C{r}_2{O}_7^{2-}\to 2C{r}^{3+}$
• B. $Mn{O}_4^{-}\to M{n}^{2+}$
• C. $Cr{O}_4^{2-}\to C{r}^{3+}$
• D. $C_2{O}_4^{2-}\to 2C{O}_2$

Answer 1

Answer: (B)

$Mn{O}_4^{-}+5e\to M{n}^{2+}$