Question:
Which species has bond order 2.5 and is paramagnetic?
Which species has bond order 2.5 and is paramagnetic?
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Odd electron species → paramagnetic automatically.
Updated On: Jun 10, 2026
- O$_2$
- N$_2^+$
- O$_2^{2-}$
- C$_2$
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The Correct Option is B
Solution and Explanation
Concept:
Bond order:
\[
\text{B.O.} = \frac{N_b - N_a}{2}
\]
Step 1: N$_2$ has bond order 3
Step 2: N$_2^+$ removes one electron Bond order reduces by 0.5: \[ 3 - 0.5 = 2.5 \]
Step 3: Unpaired electron Hence paramagnetic. Thus correct answer is N$_2^+$.
Step 1: N$_2$ has bond order 3
Step 2: N$_2^+$ removes one electron Bond order reduces by 0.5: \[ 3 - 0.5 = 2.5 \]
Step 3: Unpaired electron Hence paramagnetic. Thus correct answer is N$_2^+$.
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