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Byju's Answer
Standard XII
Chemistry
Redox Reactions
Account for t...
Question
Account for the following
(i)The colour of KMnO
4
disappear when oxalic acid is added to its solution
in acidic medium
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Solution
The colour of KMnO
4
gets decolonised due to the oxidation of oxalic acid to carbondioxide.
5
H
2
C
2
O
4
+
2
K
M
n
O
4
+
6
H
+
→
2
M
n
2
+
+
10
C
O
2
+
8
H
2
O
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Similar questions
Q.
The colour of
K
M
n
O
4
disappears when oxalic acid is added to its solution in an acidic medium. This can be explained as :
Q.
6.3
gram of oxalic acid,
0.4
mole of oxalic acid and
0.2
gram equivalents of oxalic acid are dissolved in a
2
litre solution.
50
ml of this solution neutralises
20
ml of
K
M
n
O
4
solution in acidic medium. Molarity of
K
M
n
O
4
solution is:
Q.
When
K
M
n
O
4
solution is added to oxalic acid solution, the decolourisation is slow in the beginning but becomes instantaneous after some time because:
Q.
The volume of
0.05
M
K
M
n
O
4
solution required to oxidize completely
2.70
g
of Oxalic acid
(
H
2
C
2
O
4
.2
H
2
O
)
in acidic medium will be:
Q.
When
K
M
n
O
4
is reduced with oxalic acid in acidic medium, the oxidation number of
M
n
changes from:
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