JEE Main 2025 Chemistry question
The number of paramagnetic metal complex species among [Co(NH₃)₆]³⁺, [Co(C₂O₄)₃]³⁻, [MnCl₆]³⁻, [Mn(CN)₆]³⁻, [CoF₆]³⁻, [Fe(CN)₆]³⁻ and [FeF₆]³⁻ with same number of unpaired electrons is.
Answer: 2
Solution
[MnCl₆]³⁻ and [CoF₆]³⁻ both have 4 unpaired electrons; hence 2 species with same number of unpaired electrons among the paramagnetic ones.