Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Consider the addition of one electron to 
and 
to form 
and 
ions respectively. Select the correct statement:
A
The bond order of 
decreases, and it becomes paramagnetic.
decreases, and it becomes paramagnetic. B
The bond order of 
decreases, and it becomes diamagnetic.
decreases, and it becomes diamagnetic. C
The bond length of 
is shorter than that of 
.
is shorter than that of . D
has no unpaired electrons.
Text Solution
Verified by ExpertsThe correct answer is:
A
extra 
enters antibonding 
decreases to 2.5 and one unpaired 
⇒ paramagnetic.
adds to 
BO decreases (to 1.5) but still has one unpaired 
paramagnetic; bond length increases.
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