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Byju's Answer
Standard IX
Chemistry
Colour
Which of the ...
Question
Which of the following set has all coloured ions
A
C
u
+
,
C
u
2
+
,
N
i
2
+
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B
C
u
2
+
,
C
o
2
+
,
S
c
2
+
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C
C
u
2
+
,
F
e
2
+
,
C
o
2
+
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D
N
a
+
,
M
g
2
+
,
A
l
3
+
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Solution
The correct option is
C
C
u
2
+
,
F
e
2
+
,
C
o
2
+
They all have unpaired
∴
They are coloured
Suggest Corrections
0
Similar questions
Q.
Magnetic moments of
M
2
+
ions (divalent cations ) of 3d-series in the decreasing order is :
Z
n
2
+
>
S
c
2
+
=
C
u
2
+
>
T
i
2
+
=
N
i
2
+
>
V
2
+
=
C
o
2
+
>
C
r
2
+
=
F
e
2
+
>
M
n
2
+
Is the above statement true?
Q.
The stabilities of coordination compounds containing the ions
C
u
2
+
,
N
i
2
+
,
C
o
2
+
,
F
e
2
+
and
M
n
2
+
follow the order:
Q.
Given ions are :
F
e
2
+
,
N
i
2
+
,
C
a
2
+
,
K
+
,
M
g
2
+
,
N
a
+
,
C
u
2
+
,
Z
n
2
+
.
If all the given ions can form complexes then enter 1, else enter 0.
Q.
The pair that gives colour when reaction with
N
H
4
S
C
N
is
Q.
Calculate the
E
and
E
∘
of the cell
N
i
|
N
i
2
+
|
|
C
u
2
+
|
C
u
from the following half-cell reactions:
N
i
2
+
+
2
e
−
→
N
i
;
E
∘
=
−
0.25
v
o
l
t
C
u
2
+
+
2
e
−
→
C
u
;
E
∘
=
+
0.34
v
o
l
t
(Given:
[
N
i
2
+
]
=
1
M
and
[
C
u
2
+
]
=
10
−
3
M
)
.
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