# NEET Chemistry Redox Reactions Questions Solved

For the redox reaction $Mn{O}_{4}^{-}+{C}_{2}{O}_{4}^{-2}+{H}^{+}\to \text{\hspace{0.17em}}M{n}^{2+}+C{O}_{2}+{H}_{2}O$ the correct coefficients of the reactants for the balanced reaction are [IIT 1988, 92; BHU 1995; CPMT 1997; RPMT 1999; DCE 2000; MP PET 2003]

 $Mn{O}_{4}^{-}$ ${C}_{2}{O}_{4}^{2-}$ ${H}^{+}$ (1) 2 5 16 (2) 16 5 2 (3) 5 16 2 (4) 2 16 5

(1) $Mn{O}_{4}^{-}+8{H}^{+}+5{e}^{-}\to M{n}^{2+}+4{H}_{2}O×2$

${C}_{2}{O}_{4}^{2-}\to 2C{O}_{2}+2{e}^{-}×5$

$\overline{2Mn{O}_{4}^{-}+5{C}_{2}{O}_{4}^{2-}+16{H}^{+}\to 2M{n}^{2+}+10C{O}_{2}+8{H}_{2}O}$

Thus the coefficient of $Mn{O}_{4}^{-}$, ${C}_{2}{O}_{4}^{2-}$ and H+ in the above balanced equation respectively are 2, 5, 16.

Difficulty Level:

• 63%
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• 16%
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