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Question
Chemistry
Which one of the following compounds does not decolourise an acidified aqueous solution of KMnO4 ?
Q. Which one of the following compounds does not decolourise an acidified aqueous solution of
K
M
n
O
4
?
3597
255
The d-and f-Block Elements
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A
Sulphur dioxide
12%
B
Ferric chloride
44%
C
Hydrogen peroxide
23%
D
Ferrous sulphate
21%
Solution:
F
e
S
O
4
,
S
O
2
and
H
2
O
2
can act as reducing agent and as such reduce
M
n
O
4
−
(pink) to
M
n
2
+
(almost colourless)