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JEE Main Chemistry Class 12 Co-ordination Compounds Part 2 Questions
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© examsnet.com
Question : 38
Total: 100
Spin only magnetic moment in BM of
[
Fe
(
CO
)
4
(
C
2
O
4
)
]
+
is
[31 Aug 2021 Shift 2]
5.92
0
1
1.73
Validate
Solution:
In
[
Fe
(
CO
)
4
(
C
2
O
4
)
]
+
, oxidation number of
Fe
=
+
3
{
x
+
4
×
0
+
(
−
2
)
=
1
}
∴ x = 3
Fe
3
+
=
[
Ar
]
3
d
5
4
s
0
CO is a strong field ligand, so pairing is favoured
Fe
3
+
=
t
2
g
2
,
2
,
1
,
e
g
0
,
0
Number of unpaired electron (n) = 1
µ
=
√
n
(
n
+
2
)
BM
=
√
1
(
1
+
2
)
=
√
3
=
1.73
BM
© examsnet.com
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