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JEEMAIN and NEET
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Chemistry
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Hydrogen
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2
K
3
F
e
(
C
N
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6
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2
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O
H
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2
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2
+
z
→
y
+
w
. The
x
is
(
a
)
K
4
F
e
4
(
C
N
)
2
(
b
)
2
K
4
F
e
(
C
N
)
6
(
c
)
2
K
4
F
e
2
(
C
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6
(
d
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2
K
4
F
e
4
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3
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