For the redox reaction: MnO 4 - + C 2 O 4 2 - + H + → Mn 2 + + CO 2 + H 2 O What are the correct…

1. $\begin{array}{ccc}{\mathrm{MnO}}_4^{-}& {\mathrm{C}}_2{\mathrm{O}}_4^{2-}& {\mathrm{H}}^{+}\\ 2& 16& 5\end{array}$
2. $\begin{array}{ccc}{\mathrm{MnO}}_4^{-}& {\mathrm{C}}_2{\mathrm{O}}_4^{2-}& {\mathrm{H}}^{+}\\ 2& 5& 16\end{array}$
3. $\begin{array}{ccc}{\mathrm{MnO}}_4^{-}& {\mathrm{C}}_2{\mathrm{O}}_4^{2-}& {\mathrm{H}}^{+}\\ 16& 5& 2\end{array}$
4. $\begin{array}{ccc}{\mathrm{MnO}}_4^{-}& {\mathrm{C}}_2{\mathrm{O}}_4^{2-}& {\mathrm{H}}^{+}\\ 5& 16& 2\end{array}$

Solution

Multiplying $\left(1\right)$ by $\left(2\right)$ to balance ${\mathrm{e}}^{-}$
$2{\mathrm{MnO}}_4^{-}+5{\mathrm{C}}_2{\mathrm{O}}_4^{-2}+16{\mathrm{H}}^{\oplus }\to 2{\mathrm{Mn}}^{+2}+10{\mathrm{CO}}_2+8{\mathrm{H}}_2\mathrm{O}$

Asked in: NEET 2018

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