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Balancing redox equations in acidic and basic media
JEE Main level
Single correct option
Difficulty 2 of 3
rx056
In acidic medium permanganate oxidises oxalate to carbon dioxide. The mole ratio
n
(
MnO
X
4
X
−
)
:
n
(
C
X
2
O
X
4
X
2
−
)
that react is
A
2 : 5
B
5 : 2
C
1 : 5
D
1 : 2
Answer: A
Each
MnO
X
4
X
−
gains 5 electrons and each
C
X
2
O
X
4
X
2
−
loses 2 electrons. Equalising electrons: 2 x 5 = 5 x 2 = 10, so the ratio is 2 : 5.
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