For the redox reaction
`MnO_(4)^(ө)+C_(2)O_(4)^(2-)+H^(o+)rarrMn^(2+)+CO_(2)+H_(2)O`
the correct coefficients of the reactions for the balanced reaction are

Options

A. `{:(MnO_(4)^(-),C_(2)O_(4)^(2-),H^(+)),(16,5,2):}`
B. `{:(MnO_(4)^(-),C_(2)O_(4)^(2-), H^(+)),(2,5,16):}`
C. `{:(MnO_(4)^(-),C_(2)O_(4)^(2-),H^(+)),(2,16,5):}`
D. `{:(MnO_(4)^(-),C_(2)O_(4)^(2-),H^(+)),(5,16,2):}`

Answer

B

Explanation

`MnO_(4)^(-) +5e^(-) rarr Mn^(2+)` ...(1)
`underset(O)underset(||)underset(" C"-O^(-))underset(|)overset(O)overset(||)(" C"-O^(-))rarr 2CO_(2) +2e^(-)`
multiplying (1) by 2 and (2) by 5 yo balance `e^(-)`
`2MnO_(4)^(-) +5C_(2)O_(4)^(-2) rarr 2Mn^(+2) +10 CO_(2)`
Only suitable choice is (b).