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Question
Chemistry
Acidified potassium permanganate solution is decolourised by
Q. Acidified potassium permanganate solution is decolourised by
1942
201
The d-and f-Block Elements
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A
Bleaching powder
B
White vitriol
C
Mohr’s salt
D
Microcosmic salt
Solution:
Mohr’s salt.
2
K
M
n
O
4
+
8
H
2
S
O
4
+
10
F
e
S
O
4
→
K
2
+
S
O
4
+
2
M
n
S
O
4
+
5
F
e
2
(
S
O
4
)
3
+
8
H
2
O
Mohr’s salt decolourises
K
M
n
O
4
by reducing
M
n
+
7
ions to
M
n
+
2
ions.