JEE Main 2025 Chemistry question

ChemistryCoordination CompoundsJEE Main 2025

Identify the coordination complexes in which the central metal ion has configuration. (A) [FeO₄]²⁻ (B) [Mn(CN)₆]³⁻ (C) [Fe(CN)₆]³⁻ (D) Cr₂(O–C–Me)₄(H₂O)₂ (with C=O) (E) [NiF₆]²⁻ Choose the correct answer from the options given below :

Answer: (3)

Solution

Fe⁺⁶=3d²; Mn⁺³=3d⁴; Fe⁺³=3d⁵; Cr⁺²=3d⁴; Ni⁺⁴=3d⁶. Only (B) and (D) have d⁴.

Question ID VK-001881