JEE Main 2025 Apr 4 Shift 1, Chemistry Q19: d-Block Elements
JEE Main2025Apr 4, Shift 1Chemistry
Q.
Pair of transition metal ions having the same number of unpaired electrons is :
- A
- B
- C
- D
Solution
Count -electrons and unpaired electrons assuming weak-field aqua-type environments (Hund's rule):
| Ion | Unpaired | |
|---|---|---|
| V | 3 | |
| Co | 3 | |
| Ti | 2 | |
| Fe | 5 | |
| Cr | 4 | |
| Ti | 1 | |
| Mn | 5 |
Only and share an unpaired-electron count (both 3).
Option (1).
Concept behind this question
d-Block ElementsNotes, formulas and examples →More previous year questions on d-Block Elements
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