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JEE Main Chemistry Class 11 Chemical Bonding and Molecular Structure Part 1 Questions
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© examsnet.com
Question : 4
Total: 100
The bond order and magnetic behaviour of
O
2
−
ion are, respectively
[26 Aug 2021 Shift 2]
1.5
and paramagnetic
1.5
and diamagnetic
2 and diamagnetic
1 and paramagnetic
Validate
Solution:
O
2
−
(Total electrons = 17) =
σ
1
s
2
,
σ
*
1
s
2
σ
2
s
2
σ
*
2
s
2
σ
2
p
z
2
,
π
2
p
x
2
=
π
2
p
y
2
π
*
2
p
x
2
=
π
*
2
p
y
1
,
σ
*
2
p
z
0
Number of unpaired electron = 1
So, it is paramagnetic.
Bond order
=
n
b
−
n
a
2
=
10
−
7
2
=
1.5
© examsnet.com
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