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Chemistry
KMnO4 in alkaline medium changes to
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Q. $KMnO_4$ in alkaline medium changes to
AIIMS
AIIMS 2014
The d-and f-Block Elements
A
$Mn^{3+}$
5%
B
$MnO_2$
34%
C
$MnO_4^{2-}$
53%
D
$Mn(OH)_4^-$
8%
Solution:
In alkaline solution, $KMnO_4$ is first reduced to manganate and then to insoluble manganese dioxide.
$2KMnO_4 + H_2O \xrightarrow{\text{alkaline}} 2MnO_2 + 2KOH + 3[O]$