MHT CET202618 April 2026Morning ShiftChemistryCoordination CompoundsActual

Find EAN of Fe in Fe(CO) ₅

Options

Correct answer

B. 36

Step-by-step solution

The Effective Atomic Number (EAN) is calculated using the formula: EAN = Z - Oxidation State + 2 Coordination Number For Fe(CO) ₅ : Atomic number of Fe ( Z ) = 26 Oxidation state of Fe = 0 (since CO is a neutral ligand) Coordination number = 5 EAN = 26 - 0 + 2 5 EAN = 26 + 10 = 36

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