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Chemical Bonding
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Molecular orbital theory
JEE Advanced level
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Difficulty 3 of 3
cb159
In which of the following changes does the bond length decrease?
A
O
X
2
→
O
X
2
X
+
B
N
X
2
→
N
X
2
X
+
C
O
X
2
→
O
X
2
X
−
D
NO
→
NO
X
+
Answer: A, D
O
X
2
→
O
X
2
X
+
: bond order 2 to 2.5 (shorter).
N
X
2
→
N
X
2
X
+
: 3 to 2.5 (longer).
O
X
2
→
O
X
2
X
−
: 2 to 1.5 (longer).
NO
→
NO
X
+
: 2.5 to 3 (shorter).
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