A) \[MnO_{4}^{-}\] \[{{C}_{2}}O_{4}^{2-}\] \[{{H}^{+}}\] 2 5 16
B) 16 5 2
C) 5 16 2
D) 2 16 5
Correct Answer: A
Solution :
\[MnO_{4}^{-}+8{{H}^{+}}+5{{e}^{-}}\to M{{n}^{2+}}+4{{H}_{2}}O\times 2\] \[{{C}_{2}}O_{4}^{2-}\to 2C{{O}_{2}}+2{{e}^{-}}\times 5\] \[\overline{2MnO_{4}^{-}+5{{C}_{2}}O_{4}^{2-}+16{{H}^{+}}\to 2M{{n}^{2+}}+10C{{O}_{2}}+8{{H}_{2}}O}\] Thus the coefficient of \[MnO_{4}^{-}\], \[{{C}_{2}}O_{4}^{2-}\]and\[{{H}^{+}}\]in the above balanced equation respectively are 2, 5, 16.
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