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JEE Main Chemistry Class 11 Electrochemistry Part 2 Questions
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© examsnet.com
Question : 55
Total: 79
The spin-only magnetic moment value of
M
3
+
ion (in gaseous state) from the pairs
C
r
3
+
∕
C
r
2
+
,
M
n
3
+
∕
M
n
2
+
,
F
e
3
+
∕
F
e
2
+
and
C
o
3
+
∕
C
o
2
+
that has negative standard electrode potential, is _____ B.M. [Nearest integer]
[25-Jul-2022-Shift-2]
Your Answer:
Validate
Solution:
Among the pairs given,
Cr
3
+
∕
Cr
2
+
has negative reduction potential which is
−
0.41
V
.
Cr
(
III
)
⇒
d
3
Number of unpaired electrons
=
3
µ
=
√
3
(
3
+
2
)
=
√
15
≃
4
B.M.
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