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Chemical Bonding
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Molecular orbital theory
NEET level
Single correct option
Difficulty 1 of 3
cb115
Among
O
X
2
,
O
X
2
X
+
,
O
X
2
X
−
and
O
X
2
X
2
−
, the species with the longest bond length is
A
O
X
2
B
O
X
2
X
2
−
C
O
X
2
X
−
D
O
X
2
X
+
Answer: B
Bond orders are
O
X
2
X
+
2.5,
O
X
2
2,
O
X
2
X
−
1.5,
O
X
2
X
2
−
1. Bond length increases as bond order decreases, so
O
X
2
X
2
−
has the longest bond.
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