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Problem
Problem
K
3
[
Fe
(
CN
)
6
]
\text{K}_3[\text{Fe}(\text{CN})_6]
K
3
[
Fe
(
CN
)
6
]
is used in the detection of
Fe
2
+
\text{Fe}^{2+}
Fe
2
+
ion with which it gives a deep blue colour. This colour is due to the formation of : a.
K
2
Fe
[
Fe
(
CN
)
6
]
\text{K}_2\text{Fe}[\text{Fe}(\text{CN})_6]
K
2
Fe
[
Fe
(
CN
)
6
]
b.
Fe
4
[
Fe
(
CN
)
6
]
3
\text{Fe}_4[\text{Fe}(\text{CN})_6]_3
Fe
4
[
Fe
(
CN
)
6
]
3
c.
Fe
[
Fe
(
CN
)
6
]
\text{Fe}[\text{Fe}(\text{CN})_6]
Fe
[
Fe
(
CN
)
6
]
d.
Fe
3
[
Fe
(
CN
)
6
]
2
\text{Fe}_3[\text{Fe}(\text{CN})_6]_2
Fe
3
[
Fe
(
CN
)
6
]
2
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