NEET-XII-Chemistry
Previous Year Paper year:2018
- #76For the redox reaction
``\ce MnO4^-
+ C2O4^{2-}+ H^+
\longrightarrow Mn^{2+} +CO2 + H2O``
the correct coefficients of the reactants for the
balanced equation are
``MnO_4^{-}`` ``C_2O_4^{2-}`` `` H^+``
(1) 16 5 2
(2) 2 5 16
(3) 2 16 5
(4) 5 16 2digAnsr: 2Ans : (2)
Sol.
7
2
4MnO Mn ; 5e gain
+
+ (1)
+ +
3 4
2
2 4 2C O CO ; 2e loss (2)
multiplying (1) by 2 and (2) by 5 to balance e-
++ +2 24 2 4 22MnO 5C O 2Mn 10CO
on balancing charge;
+ ++ + + +2 24 2 4 2 22MnO 5C O 16H 2Mn 10CO 8H O
15
CODE - PP