Number of molecules having bond order 2 from the following is

Question

Canvas Classes · Accepted Answer

Step 1 — Calculate bond orders using MO theory:

| Species | Total e⁻ | Bonding e⁻ | Antibonding e⁻ | Bond Order |
|---------|----------|-----------|----------------|------------|
|  | 12 | 8 | 4 | (8−4)/2 = 2 ✓ |
|  | 16 | 10 | 6 | (10−6)/2 = 2 ✓ |
|  | 8 | 4 | 4 | (4−4)/2 = 0 |
|  | 6 | 4 | 2 | (4−2)/2 = 1 |
|  | 20 | 10 | 10 | (10−10)/2 = 0 |
|  | 14 | 10 | 4 | (10−4)/2 = 3 |
|  | 4 | 2 | 2 | (2−2)/2 = 0 |

Step 2:  and  have bond order 2 → 2 molecules

Answer: 2

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