MCQ
Among the following species, the diamagnetic molecule is
- A$O_2$
- B$NO$
- C$B_2$
- ✓$CO$
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| Column I | Column II |
| A. 3d-transition series | 1. Cerium (Z = 58) |
| B. 4d-transition series | 2. Actinium (Z = 89) |
| C. 4f-inner transition series | 3. Zinc (Z = 30) |
| D. 5f-inner transition | 4.Yttrium (Z = 39) |

$Cl_2 + 2Y^-\to 2Cl^-+ Y_2$
The incorrect match regarding above reaction is