Which is not correctly matched ? — Coordination Compounds Chemistry Question

💡 Solution & Explanation

Step 1: Ligands with higher field strength produce larger splitting (Δ_o) (I). Step 2: Higher positive charges on the metal ion attract ligands more closely, increasing orbital repulsion and Δ_o (II). Step 3: Moving from 3d to 4d to 5d transition series increases orbital size and splitting energy (III). Since all three statements are correct, option (a) is correct.