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Question
Chemistry
Potassium manganate (K2MnO4) is formed when
Q. Potassium manganate
(
K
2
M
n
O
4
)
is formed when
2275
228
IIT JEE
IIT JEE 1988
The d-and f-Block Elements
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A
chlorine is passed into aqueous
K
M
n
O
4
solution
12%
B
manganese dioxide is fused with
K
O
H
in air
47%
C
formaldehyde reacts with potassium permanganate in the presence of strong alkali
26%
D
potassium permanganate reacts with conc.
H
2
S
O
4
24%
Solution:
2
K
O
H
+
M
n
O
2
+
O
2
Δ
K
2
M
n
O
4
+
H
2
O
H
C
H
O
+
K
M
n
O
4
+
2
K
O
H
→
K
2
M
n
O
4
+
H
2
O
+
H
COO
H