The bond order and magnetic property of acetylide ion () are same as that of

Question

Canvas Classes · Accepted Answer

Step 1 — Acetylide ion  (14 electrons):
- Isoelectronic with 
- Bond order = (10−4)/2 = 3
- All electrons paired → diamagnetic

Step 2 — Check each option:

| Species | e⁻ | Bond Order | Magnetic |
|---------|-----|-----------|----------|
|  | 15 | 2.5 | Paramagnetic |
|  | 13 | 2.5 | Paramagnetic |
|  | 10 | 3 | Diamagnetic ✓ |
|  | 17 | 1.5 | Paramagnetic |

has BO = 3 and is diamagnetic — matches acetylide ion.

Answer: Option (3) —

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