JEE Main 2020 — Coordination Compounds Question with Solution
From: JEE Main 2020 (Online) 4th September Morning Slot
Question
The pair in which both the species have the
same magnetic moment (spin only) is :
Choose an option
Show full solutionCorrect option: D
Correct answer
D[Cr(H2O)6]2+ and [Fe(H2O)6]2+
Step-by-step explanation
Species with same number of unpaired
electrons have equal magnetic moment.
| Complex | Ligand | Ligand Type | Number of unpaired electrons |
|---|---|---|---|
| [Mn(H2O)6]2+ | H2O | Weak Field Ligand | 5 |
| [Cr(H2O)]2+ | H2O | Weak Field Ligand | 4 |
| [CoCl4]2– | Cl | Weak Field Ligand | 3 |
| [Fe(H2O)6]2+ | H2O | Weak Field Ligand | 4 |
| [Co(OH)4]2– | OH | Weak Field Ligand | 3 |
| [Fe(NH3)6]2+ | NH3 | Weak Field Ligand | 4 |
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This is a previous-year question from JEE Main 2020, covering the Coordination Compounds chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.