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Byju's Answer
Standard XII
Chemistry
Variable Oxidation States
The magnetic ...
Question
The magnetic moments of complexes given below are in the order:
(I)
[
N
i
(
C
O
)
4
]
(II)
[
M
n
(
C
N
)
6
]
4
−
(III)
[
C
r
(
N
H
3
)
6
]
3
+
(IV)
[
C
o
F
6
]
3
−
.
A
(
I
)
>
(
I
I
)
>
(
I
I
I
)
>
(
I
V
)
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B
(
I
)
<
(
I
I
)
<
(
I
I
I
)
<
(
I
V
)
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C
(
I
I
)
>
(
I
I
I
)
>
(
I
V
)
>
(
I
)
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D
(
I
V
)
<
(
I
I
)
<
(
I
)
<
(
I
I
I
)
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Solution
The correct option is
B
(
I
)
<
(
I
I
)
<
(
I
I
I
)
<
(
I
V
)
As magnetic moment
μ
=
√
n
(
n
+
2
)
, where n is no. of unpaired electron.
In
[
N
i
(
C
O
)
4
]
,
d
8
configuration, low spin complex, 0 unpaired electron.
In
[
M
n
(
C
N
)
6
]
4
−
,
d
5
configuration, low spin complex, 1 unpaired electron.
In
[
C
r
(
N
H
3
)
6
]
3
+
,
d
3
configuration, 3 unpaired electron.
In
[
C
o
F
6
]
3
−
,
d
6
configuration, high spin complex, 4 unpaired electron.
Suggest Corrections
0
Similar questions
Q.
Increasing value of magnetic moment for the given compounds is:
(I)
[
F
e
(
C
N
)
6
]
4
−
(II)
[
F
e
(
C
N
)
6
]
3
−
(III)
[
C
r
(
N
H
3
)
6
]
3
+
(IV)
[
N
i
(
H
2
O
)
6
]
2
+
Q.
Increasing value of magnetic moment for the given compounds is:
(I)
[
F
e
(
C
N
)
6
]
4
−
(II)
[
F
e
(
C
N
)
6
]
3
−
(III)
[
C
r
(
N
H
3
)
6
]
3
+
(IV)
[
N
i
(
H
2
O
)
6
]
2
+
Q.
The correct order spin-only magnetic moments of the following complexes is:
(
I
)
[
C
r
(
H
2
O
)
6
]
B
r
2
(
I
I
)
N
a
4
[
F
e
(
C
N
)
6
]
(
I
I
I
)
N
a
3
[
F
e
(
C
2
O
4
)
3
]
(
Δ
0
>
P
)
(
I
V
)
(
E
t
4
N
)
2
[
C
o
C
l
4
]
Q.
The correct order of strength of
+
I
effect is:
I.
−
C
H
3
II.
−
C
D
3
III.
−
C
T
3
IV.
−
C
H
D
2
Q.
Arrange (I)
C
e
3
+
, (II)
L
a
3
+
, (III)
P
m
3
+
and (IV)
Y
b
3
+
in increasing order of their ionic radii
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